This free VoIP checker tells you whether a phone number is VoIP, a cell phone or a landline.
Enter a phone number to see whether it is VoIP, mobile or landline, and whether it is valid. It is free, with no signup, and it shows the line type, not who owns the number.
Pick the country, then enter the number without the country code.
Free & rate-limited. No signup required to try.
Checking 10,000 or more numbers a month? Book a demo
Example resultThis is a real lookup we captured on 2026-08-23 for +12024561414. Run any lookup above and it is replaced with yours.
Landline number
This is a landline number.
See where the 202 area code is, its local time and its history
A VoIP checker tells you whether a phone number is a VoIP line, a mobile, or a landline. 1Lookup's free VoIP checker returns the number's line type, whether it is valid, its country and whether it is a vanity number, so you can check if a number is VoIP before you trust it and avoid texting landlines; a free account adds the carrier.
- No signup to try
- VoIP, mobile or landline
- Works for international numbers
Page checked
You can check if a number is VoIP in three steps.
Enter the number.
Type it in international format with its country code, such as +14155550132. Local formats work too when the country is clear.
Read the line type.
It comes back as VOIP, MOBILE, LANDLINE, TOLL_FREE, PREMIUM or UNKNOWN, with whether the number is valid and its country. A cell phone comes back as MOBILE and a landline as LANDLINE, so the same check tells you whether a number is a cell phone or a landline.
Decide what to do.
Text a mobile, call a landline, and add a verification step before you trust a VoIP number, because plenty of real people and businesses use VoIP.
Need this at scale? Phone Validation API
Classify mobile, landline and VoIP at scale with carrier and validity detail.
On this page
You can check if a number is VoIP before you trust it.
A line type lookup, also called a VoIP checker, tells you whether a phone number is a mobile, a landline, or a VoIP/toll-free line. That single detail changes how you should reach someone. You can text a mobile, but you can't reliably text a landline, and VoIP numbers behave differently again. Our free phone line type lookup gives you the answer before you spend a message credit or a dial.
This landline or mobile checker is the free version of 1Lookup's number type lookup, the same check our API runs. Enter a number in international or local format and we return the line type, whether the number is valid, its country, and whether it's a recognizable vanity number, all without storing the number against your contacts.
Wondering "is this number a cell phone or landline?" The free result answers it. Marketers use it to avoid texting landlines, developers use it to validate inputs at signup, and call centers use it to route dials intelligently. When you need carrier, live reachability, or bulk processing, a free account and our API take you the rest of the way.
Line type is one field in a full phone validation.
Line type is one field in a wider validation response. For the full stack of checks, the response fields around it, and how to wire validation into a signup or checkout flow, read our guide to phone number validation. Line type does not tell you whether a mobile number has moved to another network. To see if it has been ported, use our free MNP checker. To see which country a number's code belongs to and how to dial it, open every country calling code. And to find out whether a number is valid, not only which type of line it is on, use our free phone validator. Line type does not say whether a mobile is switched on, so to check that, run our free HLR lookup. Line type says what kind of line a number is, not which company holds it, so to see the carrier, use our free carrier lookup. To check only whether a number is a mobile line, with the line type, validity and country, use our free mobile number checker. To see whether a number is toll-free and when its code went into service, use our free toll-free number lookup. To check a number from any country for a virtual line and see what the record can and cannot say about it, use our free virtual number checker. To get a yes or a no on whether a number is a landline, use our free landline checker. To check the line type of every number in a list from one CSV file, use our free bulk phone number checker. To flag known TCPA litigators on a calling list, see our free TCPA litigator check. To see what a number's line type means for texting, use our free SMS capable number checker. A VoIP number is not a warning sign on its own: many ordinary people use one to keep their own number off listings and one-off sign-ups. Our sister service ExpressNumber shows how a disposable phone number works.
A VoIP number lookup returns these fields, and each one answers a different question.
This is an invented result for a made-up number, laid out the way a check comes back. The first four fields are free on this page, and a free trial opens the rest.
- Line typeVoIP
- ValidYes
- CountryUnited States
- Vanity numberNo
Opens with a free trial
- CarrierLevel 3 Communications, LLC
- Possibly portedNo
- Region and time zoneCalifornia, Pacific
Line type
Mobile, landline, VoIP or toll-free. VoIP numbers can be created and dropped in minutes, so fraud and verification teams look twice at them, though plenty of real people and businesses use VoIP.
Valid
Whether the number is a real, dialable number in its country's numbering plan. A no usually means a typo or a made-up number.
Country
The country the number belongs to, read from its country code.
Vanity number
Whether the number spells a word or uses an easy pattern, which usually marks a business line.
Carrier
The network company the number belongs to. For a VoIP number this is often the wholesale company that issued it rather than the app the person uses.
Possibly ported
Whether the number may have moved to another carrier since it was issued. For a definite answer on a mobile, run our HLR lookup.
Region and time zone
Where in the country the number was issued and its local time zone, so you call at a sensible hour.
The VoIP check takes three steps, and the number is never called.
You enter a phone number.
Type or paste any phone number, ideally in E.164 international format like +14155550132. Local formats work too when the country is clear. The tool normalizes spacing, dashes, and parentheses automatically before it runs the check.
We classify the line.
1Lookup reads the number's record in number-type data to determine whether it's a mobile, landline, VoIP or toll-free line, confirms it's a valid, dialable number, and identifies the country of origin.
You read the result and can go deeper.
See the line type, validity, country, and vanity flag right away. Sign up free to unlock carrier name, region detail, and portability status, or send full lists through the bulk API.
A VoIP check reads the number's record, because the digits alone can't show the line type.
VoIP providers issue numbers in the same local area codes as mobiles and landlines, so the line type has to be looked up.
- You enter the numberWith its country, so it is read in the right numbering plan.
- Its record is looked upNumber-type data says whether it is mobile, landline, VoIP or toll-free, and whether it is valid.Nothing is sent to the number, so it never rings.
- You see the line typeLine type, validity, country and the vanity flag.
A VoIP number lookup, a VoIP checker, a VoIP phone number search and a VoIP detector are all names for the same check.
This free tool is the VoIP number lookup, the VoIP checker, the phone number type lookup and the landline checker that people look for under those names, because each one reads a phone number's record and says what type of line it is on. A few of the names ask for something this page does not do, and the table says which, so you can tell what you need.
| What people search for | What it means | Where to read it |
|---|---|---|
| VoIP number lookup, VoIP phone number lookup, VoIP phone lookup or VoIP lookup | Looking a phone number up to see what type of line it is on, which comes back as VoIP, mobile, landline, toll-free, premium or unknown | The Line type field of the result |
| VoIP checker, VoIP number checker, VoIP check, VoIP detector or VoIP validator | The same lookup under another name: it reads the number's record and shows whether the number is VoIP, and it does not guess from the area code | The Line type field of the result |
| Check if a number is VoIP, or check if a number is VoIP or real | Run the number and read its line type, then its Valid field, which says whether it is a real, dialable number in its country's numbering plan | The Line type and Valid fields of the result |
| VoIP phone number search | The same lookup. It checks the line type of one number and is not a directory of VoIP numbers, so it cannot list who runs a VoIP line | The Line type field of the result |
| Landline checker, landline lookup or landline number check | The same lookup read for one answer: a landline comes back as Landline, and a separate free landline checker gives a yes or no on landlines only | The Line type field of the result |
| Phone number type lookup, phone line type checker, phone type lookup or line type lookup | The same lookup named after what it returns, which is the type of line behind the number | The Line type field of the result |
| Non-fixed VoIP lookup | The checker reports a fixed VoIP number and a non-fixed one both as VoIP and does not split them | The Line type field of the result |
| Identify VoIP provider | A lookup that names the company behind a VoIP number. The free result stops at the line type, validity, country and vanity flag, and a free account adds the carrier, which for a VoIP number is often the wholesale company that issued it | The Carrier field, with a free account |
The line type tells you whether a number is a cell phone, a landline or VoIP, and what each one means for calling and texting.
People ask this in many ways: is this a cell phone or a landline, is this number mobile or landline, is it VoIP or real. The lookup answers all of them from one field, the line type, and the table shows how to read it. A cell phone is the line type Mobile.
| What you want to know | What the lookup shows | What it means |
|---|---|---|
| Whether a number is a cell phone or a landline | The line type is Mobile for a cell phone and Landline for a landline | A mobile can receive a text, and a landline usually cannot |
| Whether a number is a landline | The line type is Landline | A physical line to one address, so call it and do not text it |
| Whether a number is VoIP | The line type is VoIP | The number connects over the internet, from any device, so add a verification step before you trust it, because plenty of real people and businesses use VoIP |
| Whether a number is real | Valid reads Yes or No | Yes means a real, dialable number in its country's numbering plan, and No usually means a typo or a made-up number |
| Whether a text can reach the number | The line type is Mobile, Landline or VoIP | A mobile can receive one, a landline usually cannot, and a VoIP number sometimes can, through gateways |
| Whether a number is toll-free | The line type is Toll Free | A toll-free number, such as an 800, 888 or 877 number |
A number's area code does not show whether it is VoIP, a cell phone or a landline, because the line type has to be looked up.
VoIP providers issue numbers in the same local area codes as mobiles and landlines, and numbers move between carriers and line types, so the digits alone cannot answer it. The lookup reads the number's record instead, and this is how each way of entering a number is read.
| What you have | What the lookup does | What you get |
|---|---|---|
| A local area code, such as 415 or 202 | Reads the number's record in number-type data and not the area code | The line type the record holds, whatever the area code suggests |
| A VoIP number that looks like any other local number | Reads the record, because VoIP services issue numbers in the same area codes as mobiles and landlines | VoIP, which cannot be seen from the digits |
| A number that began as a landline | Reads the current record, because numbers move between carriers and line types | The line type now, which may be Mobile or VoIP |
| A number typed without a plus sign | Reads it in the country picked beside the box | The same answer, with the number read in the country picked |
| A number with its country code, such as +442071838750 | Reads it in that country's numbering plan and does not use the country picker | The line type, validity and country for that number |
| Only an area code or the first digits | Nothing, because a lookup needs the whole number | No line type until the whole number is entered |
The lookup shows what kind of line a number is on, and it does not show who owns the number or where the phone is.
The free result is the line type, whether the number is valid, its country and whether it is a vanity number. These are the things people hope to find from a VoIP or landline lookup, and what answers each one.
| What people hope to find | Does the lookup show it | What to use instead |
|---|---|---|
| The name or address of the owner | No, because VoIP providers sell numbers with no public directory behind them and the lookup reads the line type, not a name | The free reverse phone lookup, which shows a listed owner where a public record exists |
| The VoIP provider or app behind a VoIP number | Not on the free result, which stops at the line type, validity, country and vanity flag | A free account, which adds the carrier. For a VoIP number that is often the wholesale company that issued it, not the app the person uses |
| Whether the phone is switched on | No, because the line type does not say whether a mobile is on | The HLR lookup, which asks a mobile number's network whether it is on, wherever the network answers live queries |
| Whether the number has moved to another carrier | Not on the free result, where a free account adds the possibly ported flag | The MNP checker, which shows whether a number has been ported |
| A phone's location on a map | No, because the lookup shows the number's country and, with a free account, the region it was issued in, never a point on a map | The phone number location lookup, which shows the area a US or Canadian number was assigned to |
| Whether the number is a scam | No. A VoIP answer is a reason to look harder and not proof of fraud, and the API suggests the action VERIFY, not BLOCK | The spam phone checker, which shows whether people have reported a US number as spam |
VoIP, mobile and landline numbers differ in how they connect and how far you can trust them.
The three line types this check tells apart, and why the distinction is the whole point: a VoIP number can be bought in minutes with no identity behind it, which is why fraud and verification teams treat the line type as a signal.
| VoIP | Mobile | Landline | |
|---|---|---|---|
| How it connects | Over the internet, from any device | Cellular network, tied to a SIM | A physical line to one address |
| Tied to a place | No | No, moves with the owner | Yes |
| How fast to obtain | Minutes, often free, little or no ID | Requires a SIM; bulk acquisition is harder | Slowest; an installed service |
| Receives SMS | Sometimes, via gateways | Yes | Usually not |
| Typical legitimate use | Business phone systems, support lines, remote teams | Personal numbers | Homes and offices |
| In fraud screening | Highest scrutiny: disposable and anonymous by default | Normal | Normal, and hardest to fake |
The line type comes back as one of six values, and each one tells you how to treat the number.
The value is in classification.number_type of the number type API, and the free tool shows the same answer as a label. These are all six, so an unfamiliar word in a result is not mistaken for an error.
| API value | What it means | What to do |
|---|---|---|
| MOBILE | A cellular number tied to a SIM. | Text it, and run an HLR lookup if you need to know the phone is switched on. |
| LANDLINE | A physical line to one address. | Call it, because a landline usually cannot receive a text. |
| VOIP | A number that connects over the internet, from any device. | Check it before you trust it. The API suggests the action VERIFY, not a block, because many real people and businesses use VoIP. |
| TOLL_FREE | A toll-free number, such as an 800, 888 or 877 number. | Keep it out of a list that should hold only mobile numbers. |
| PREMIUM | A premium-rate number, which is a pay-per-call service. | Keep it off any list you call or text. |
| UNKNOWN | The record does not say what type of line it is. | Treat it as unchecked, not as a bad number. |
A VoIP check returns these fields next to the line type, and each one answers a different question.
These are the fields of the number type API, with where you see each one. The free tool on this page shows the line type, validity, country and vanity flag, and a free account adds the carrier, region and ported fields.
| API field | What it tells you | Where you see it |
|---|---|---|
| number_type | The line type, as one of the six values above. | Free tool and API |
| is_valid | Whether the number is valid. An invalid number is not charged. | Free tool and API |
| invalid_reason | Why a number was turned away as invalid. | API |
| country, country_code | The country the number belongs to, read from its country code. | Free tool and API |
| is_vanity_number | Whether the number spells a word or uses an easy pattern, which usually marks a business line. | Free tool and API |
| carrier, mccmnc | The original network name and its network code. For a VoIP number it is often the wholesale company that issued the number, not the app the person uses. | Free account and API |
| regions, timezones | Where in the country the number was issued and its local time zone, so you call at a sensible hour. | Free account and API |
| is_possibly_ported | Whether the number may have moved to another carrier since it was issued. | Free account and API |
| qualifies_for_hlr_lookup | Whether an HLR lookup can give live status for this number. | API |
| query_status | OK when the lookup ran, and ERROR when it did not. | API |
| info_text | A one-sentence description of the result, such as This is a landline number. | Free tool and API |
| risk_assessment.risk_level, recommendations.primary_action | A risk level of LOW, MEDIUM, HIGH or CRITICAL, and a suggested action of APPROVE, VERIFY, REVIEW or BLOCK. A VoIP number comes back as VERIFY, not BLOCK. | API |
A VoIP check costs 1 credit, about $4.95 per 1,000 numbers on Starter and $2.00 on Enterprise.
These are the monthly plans on the pricing page. An invalid number is not charged, every plan starts with a 7-day free trial, the same credits pay for every other 1Lookup check, and the free tool on this page checks one number at a time with no signup.
| Plan | About per 1,000 numbers | Monthly price | Line type checks included |
|---|---|---|---|
| Starter | $4.95 | $99 | 20,000 |
| Growth | $3.52 | $299 | 85,000 |
| Professional | $3.20 | $799 | 250,000 |
| Enterprise | $2.00 | $1,999 | 1,000,000 |
You can check whether a whole list of numbers is VoIP with one CSV file.
The free tool checks one number at a time. With a 1Lookup account you upload a CSV file, pick the column that holds the numbers and download the same file back with the line type columns filled in on every row. These are 6 of the columns it adds.
| phone | NumberType | IsValid | IsPossiblyPorted | IsVanityNumber | Carrier | Country |
|---|---|---|---|---|---|---|
| +14155550132 | VOIP | Yes | No | No | Level 3 Communications, LLC | United States |
| +12125550187 | LANDLINE | Yes | No | No | RCN Telecom Services, LLC | United States |
| +447700900123 | MOBILE | Yes | Yes | No | EE | United Kingdom |
| +18005550199 | TOLL_FREE | Yes | No | No | United States |
- 1 credit a number, the same price as one API lookup.
- Up to 2 million rows in one CSV file.
- Up to 1,000 API requests a minute for each API key, and each account can make up to 1,000 requests a minute in total across all its keys.
The number type API returns the same answer as JSON from one request.
Send the number in E.164 format to the number type endpoint with your API key. Each request costs 1 credit, each API key can send up to 1,000 requests a minute, and each account can make up to 1,000 requests a minute in total across all its keys. The line type is in classification.number_type, and a VoIP number comes back with the suggested action VERIFY rather than a block, because plenty of real people and businesses use VoIP.
curl -X POST https://app.1lookup.io/api/v1/nt-lookup \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"phone_number": "+14155550132"}'import requests
response = requests.post(
"https://app.1lookup.io/api/v1/nt-lookup",
headers={"Authorization": "Bearer YOUR_API_KEY"},
json={"phone_number": "+14155550132"},
)
data = response.json()["data"]
print(data["classification"]["number_type"])const response = await fetch('https://app.1lookup.io/api/v1/nt-lookup', {
method: 'POST',
headers: {
'Authorization': 'Bearer YOUR_API_KEY',
'Content-Type': 'application/json'
},
body: JSON.stringify({ phone_number: '+14155550132' })
})
const { data } = await response.json()
console.log(data.classification.number_type)Response
{
"success": true,
"data": {
"request": { "type": "nt_lookup", "input": "+14155550132" },
"classification": {
"number_type": "VOIP",
"is_valid": true,
"is_possibly_ported": false,
"is_vanity_number": false
},
"insights": {
"nt_result": {
"number_type": "VOIP",
"carrier": "Level 3 Communications, LLC",
"country": "United States",
"country_code": "US",
"regions": ["California"],
"timezones": ["America/Los_Angeles"]
}
},
"risk_assessment": { "risk_level": "MEDIUM", "risk_factors": ["VOIP_NUMBER"] },
"recommendations": { "primary_action": "VERIFY" },
"metadata": { "credits_used": 1, "credits_remaining": 9998 }
}
}To get the line type together with the carrier, location and a fraud score in one call, see our phone validation API.
It tells mobile, landline, VoIP and toll-free numbers apart.
Classify any number as mobile/cell, landline, or VoIP/toll-free. This is the core of a phone number type lookup and the fastest way to know whether SMS is even an option before you send.
It checks that the number is valid and names its country.
Every lookup confirms whether the number is a valid, dialable format and returns its country. Catch typos, fake entries, and misformatted international numbers before they pollute your database.
It flags vanity numbers that spell words.
We flag recognizable vanity numbers, the kind that spell words on a keypad or use repeating digits. It's a useful signal when you're reviewing inbound leads or business contacts at a glance.
A free account adds the carrier, region and ported status.
Upgrade to a free account for carrier identification, region details, and portability status, the deeper layers a VoIP check and an SMS team need before a real send.
Who uses this tool
SMS teams use it to clean lists before sending.
Marketing and notification teams run numbers through a mobile or landline lookup to strip out landlines and dead numbers. You stop wasting message credits on lines that can't receive a text and protect your sender reputation.
Developers use it to check numbers at signup.
Developers wire phone number type lookup into registration and checkout flows to confirm a number is valid and to require a mobile when SMS verification is mandatory. Fewer fake accounts, cleaner data downstream.
Call centers use it to route their dials.
Call centers use line type to prioritize mobiles, schedule landline callbacks and skip invalid numbers, which keeps agents on conversations that can happen.
Sales teams use it to sort lead lists.
Sales and ops teams check if a number is mobile, valid, and in the right country before importing leads. Combine line type with the vanity flag to spot business lines and improve list quality.
Frequently asked questions
What is a VoIP number lookup?
A VoIP number lookup reads a phone number's record and tells you what type of line it is on: VoIP, mobile, landline, toll-free, premium or unknown. It also shows whether the number is valid and its country, and a free account adds the carrier. It checks one number at a time and is not a directory, so it cannot list who runs a VoIP line.
Is there a free VoIP number lookup that needs no account?
Yes, this one. A single number returns its line type, whether it is valid, its country and whether it is a vanity number with no signup, with a rate limit for fair access. The carrier, region and ported status come with a free account, a whole list goes in as a CSV file, and the API starts with the 7-day free trial.
Can I check if a number is VoIP?
Yes. Enter it above and the line type comes back as VoIP, mobile or landline, free. The check reads the number's record in number-type data rather than guessing from the prefix, which matters because VoIP services issue ordinary-looking local numbers.
What does a phone number type lookup show?
A phone number type lookup shows what kind of line a number is on: VoIP, mobile, landline, toll-free, premium or unknown. It also shows whether the number is valid and its country, and a free account adds the carrier. Use it to split a list into numbers you can text and numbers you should call, and to spot a VoIP number before you trust it.
Is there a free landline checker?
Yes. Enter the number above and a landline comes back as Landline, a cell phone as Mobile and an internet phone as VoIP, free and without an account. The check reads the number's record, not its area code, so it still works when a number has moved between line types. For a yes or no on landlines only, there is a separate free landline checker.
How do I find out who is behind a VoIP number?
Often you cannot, and that is the honest answer: VoIP providers sell numbers with no public directory behind them, which is exactly why fraud teams treat VoIP as a risk signal. What you can do is confirm the line type here, then run the number through our reverse phone lookup for any public record, and treat an unverifiable VoIP number that contacted you first with suspicion.
Can you text a landline?
Usually no. Most landlines can't receive SMS, so messages either fail silently or are converted to an automated voice call by some carriers, which is unreliable. That's why an SMS team should run a line type lookup first and only send to mobile numbers. Our free tool flags landlines so you can exclude them.
How can I tell for free if a number is a cell phone or a landline?
Enter the number into our free landline or mobile checker. We look the number up in number-type data and return mobile, landline, VoIP or toll-free. You don't need to guess from the area code, which is unreliable, since numbers are often ported between line types.
What is VoIP and why does it matter?
VoIP (Voice over IP) numbers route calls over the internet rather than a traditional phone line. They're common with Google Voice, business phone apps, and toll-free services. A voip checker matters because VoIP numbers can be disposable or harder to verify, so many teams treat them with extra scrutiny in fraud and SMS workflows.
How do I check if a number is VoIP?
Enter the number above and run the check. The VoIP checker looks the number up in number-type data and returns VoIP, mobile, landline or toll-free. You can't reliably tell from the area code alone, because VoIP providers issue numbers in ordinary local prefixes and numbers get ported between line types.
Can a VoIP number look like a regular cell phone number?
Yes. VoIP services assign numbers from the same local area codes as mobiles and landlines, so a VoIP line is indistinguishable by eye. A VoIP number check reads the number's record instead of guessing from the digits, which is why teams use it to screen signups and leads for VoIP lines before trusting them.
Is the line type lookup free?
Yes. The line type, validity, country, and vanity flag are free with no signup required, subject to rate limits. Create a free account at app.1lookup.io/signup for 1,000 lookups that also unlock carrier, region, and portability data, then move to the API for bulk.
Can I check a number is mobile in bulk?
Yes. The web tool checks one number at a time. With a free account you can upload a CSV file of up to 2 million rows or call the API, and every row comes back with the number type, validity, carrier and country at 1 credit a number.
Why does my number show as a different line type than expected?
Numbers are frequently ported between carriers and line types, so a number that began as a landline may now be mobile or VoIP. Area codes no longer guarantee line type either. Our lookup reads current number-type data rather than the original assignment, which is why it beats guessing from the area code.
Does this work for international numbers?
Yes. Enter the number in E.164 format with the country code, like +442071838750, and we'll return the line type, validity, and country. The tool covers a wide range of international numbering plans. Carrier and region detail for international numbers are available with a free account and through the API.
Is there a VoIP lookup API?
Yes. Send a number to the 1Lookup number type endpoint and the JSON response carries the number type (mobile, landline, VoIP or toll-free), whether it is valid, the carrier, the country and a suggested next action, at 1 credit a number, up to 1,000 requests a minute for each API key, and each account can make up to 1,000 requests a minute in total across all its keys. The code example is on this page.
Does a VoIP number lookup show the provider?
The free check shows the line type, whether the number is valid and its country. Carrier identification, which names the network behind the number, comes with a free account. For a VoIP number that is often the wholesale company that issued it rather than the app the person uses, because apps rent their numbers from those companies.
Is a VoIP number a real phone number?
It can be. Plenty of real people and businesses use VoIP, so a VoIP line does not mean the number is fake. The lookup answers two separate questions: the line type says whether the number is VoIP, mobile or landline, and Valid says whether it is a real, dialable number in its country's numbering plan, where a no usually means a typo or a made-up number. Treat VoIP as a reason to add a verification step before you trust the number, not as a reason to block it.
Can I tell if a number is a cell phone or a landline from its area code?
No. Mobiles, landlines and VoIP lines are issued in the same local area codes, and numbers move between carriers and line types, so the area code does not decide the line type. Enter the number above and the lookup reads its record: Mobile for a cell phone, Landline for a landline and VoIP for an internet line.
How can I check if a number is a cell phone?
Enter the number above with its country. A cell phone comes back with the line type Mobile, a landline as Landline and an internet phone as VoIP, free and without an account. A cell phone can receive a text, and a landline usually cannot. For a yes or no on mobile lines only, there is a separate free mobile number checker.
Can a VoIP lookup tell if a number is non-fixed VoIP?
Not as a separate answer. The checker reports a fixed VoIP number, which is tied to an address and a billing account, and a non-fixed one, which comes from an app or an online service, both as VOIP, and does not split them. A free account adds the carrier that holds the number, which for a VoIP number is often the wholesale company that issued it.
How much does a VoIP check cost per number?
A VoIP check costs 1 credit in the API or a CSV upload, and an invalid number is not charged. That is about $4.95 per 1,000 numbers on the Starter plan, $3.52 on Growth, $3.20 on Professional and $2.00 on Enterprise. The free tool on this page checks one number at a time with no signup, and every plan starts with a 7-day free trial.
Which line types can the VoIP checker return?
It returns one of six: MOBILE, LANDLINE, VOIP, TOLL_FREE, PREMIUM or UNKNOWN. The free tool shows the same answer as a label, such as Toll Free. UNKNOWN means the record does not say what type of line it is, so treat the number as unchecked and not as a bad one.
Should I block a number that comes back as VoIP?
Not by default. Plenty of real people and businesses use VoIP, so for a VoIP number the API suggests the action VERIFY, not BLOCK. Treat it as a reason to add a step before you trust the number, and weigh it with the other signals on the signup.
What is the difference between a VoIP check, a carrier lookup and an HLR lookup?
A VoIP check returns the line type and whether the number qualifies for an HLR lookup, at 1 credit. A carrier lookup names the company that holds the number and also returns the line type, from 1 credit. An HLR lookup asks the network whether a mobile is switched on and reachable right now, at 5 credits. A portability (MNP) check, which names the network a number has moved to, costs 3 credits.
Why do scammers use VoIP numbers?
A VoIP number can be created online in minutes, often for little or nothing and with little or no ID, and dropped just as fast, so one person can use a fresh number for every attempt. That is why fraud teams treat a VoIP line as a reason to look harder. It is not proof of fraud, and for a VoIP number the API suggests the action VERIFY, not BLOCK.
What is the difference between a fixed and a non-fixed VoIP number?
A fixed VoIP number is tied to an address and a billing account, as with a business phone system or an internet phone at home. A non-fixed VoIP number comes from an app or an online service, is not tied to a place and can be created in minutes. The checker reports both as VOIP and does not split them, and a free account adds the carrier that holds the number.
How do I check if my own number is VoIP?
Enter your number in the checker above with its country code. A number that belongs to a calling app, an internet phone service or a business phone system can come back as VoIP, and a number on a mobile carrier's SIM usually comes back as mobile. A number that has been moved between providers can show a different line type from the one it started with.
How do I check if a number is a landline?
Enter the number above with its country code. A landline comes back as Landline, which is a physical line tied to one address that usually cannot receive a text. The check reads the number's record rather than its area code, because numbers move between line types.
How do I do a VoIP phone number search?
Enter the number above with its country code. The search reads the number's record and returns its line type (VoIP, mobile, landline, toll-free, premium or unknown), whether it is valid and its country. It checks the line type of one number, not a directory of VoIP numbers, so it cannot list who runs a VoIP line; for a listed owner where a public record exists, use our free reverse phone lookup.
These pages check a number in other ways.
The first three digits of a US number tell you where it was assigned.
Every area code has its own page with the places it covers, the local time there, and what to do when a call from it looks spoofed. These are the codes people look up most.
- 213Los Angeles
- 646New York City
- 917New York City
- 202Washington
- 404Atlanta
- 702Las Vegas
- 786Miami
- 415San Francisco
- 206Seattle
- 954Fort Lauderdale
- 323Los Angeles
- 929New York City
Area code 213, downtown Los Angeles, also has a page for each of its 786 prefixes, with the company NANPA lists as the holder.
New area codes catch people out, because a number from one looks unfamiliar even when it is local. These are the newest working codes.
- 465New York, since Jun 2026
- 483Alabama, since Feb 2026
- 471Mississippi, since Jan 2026
- 679Michigan, since Nov 2025
- 457Louisiana, since Sep 2025
- 729Tennessee, since Sep 2025
These carrier names show up on phone lookups, and each one has a page.
A lookup often names a company you have never seen on a bill. Each page below says what the company is and where it holds numbers.
- Level 3 Communications, LLCLumen's business and wholesale network
- Bandwidth.com CLEC, LLCSupplies numbers to VoIP and app-based phone services
- Neutral TandemWholesale phone carrier
- New Cingular Wireless PCS, LLCMobile network
- T-Mobile USA, Inc.Mobile network
- Peerless NetworkWholesale phone carrier
- Teleport Communications America, LLCAT&T's business phone network
- Southwestern BellAT&T's landline company
To see who holds America's phone numbers overall, read our study Who Hands Out America's Phone Numbers in 2026.