Free tool

This free phone number lookup checks if a number is valid and shows its line type and carrier.

Enter a phone number to see whether it is valid, and its line type, carrier and country. It is free, with no signup.

Example resultSample result for (202) 555-0143. Run any lookup above and it is replaced with yours.

Landline number · Level 3 Communications, LLC

Basic validation passed. Sign up to see full risk, reachability and compliance data.

ValidYes

Line typeLandline

Carrier / networkLevel 3 Communications, LLC

CountryUS

Region / stateDC

TimezoneAmerica/New_York

See where the 202 area code is, its local time and its history

See risk level, DNC status, and reachability

Create a free 1Lookup account to unlock the full report on every number, including a risk level, DNC compliance, reachability, and portability status. You get a 7-day free trial, plus API access and bulk list validation for cleaning whole files at once.

A phone number lookup checks whether a number is real, correctly written for its country and assigned before you call or text it. 1Lookup's free phone number lookup parses a US, Canadian or international number into E.164 format, checks it, and returns its line type, carrier, country, region and time zone.

No signup to try
Valid or invalid
Line type and carrier included
US, Canada and international

You can read a phone number lookup result in three steps.

Check that the number is valid.
Valid means it follows its country's numbering rules and is assigned. Invalid usually means a typo or a made-up number.
Read the line type and the carrier.
Mobile, landline or VoIP decides whether a text can arrive, and the carrier names the company that holds the number.
Use the country and the time zone.
They show where the number belongs and what hour it is there, so you call or text at a sensible time.

Need this at scale? Phone Validation API

Validate phone numbers at scale: carrier, line type, DNC status and a risk level on every lookup.

Phone number lookup result card showing a validated US number with mobile line type, carrier and 98% confidence score next to a phone marked valid

What a phone number lookup tells you

A phone number lookup checks whether a number is real, formatted correctly, and reachable before you ever dial or text it. Our free phone number lookup parses the number into its standard E.164 format, confirms it follows the US and Canada numbering rules, and returns the line type, carrier, country, region, and timezone. Instead of guessing whether a contact is valid, you get a clear, structured answer.

Not every number that looks right actually works. A string can pass a basic format check yet still be unassigned, disconnected, or a VoIP line set up for spam. That is why real phone validation goes beyond pattern matching. 1Lookup combines live carrier data, HLR (Home Location Register) network checks, and FCC daily data so the result reflects how the number behaves on the network today, not just whether it has the correct number of digits.

Every lead list has them: numbers typed by hand, missing a digit, or long since disconnected. Paste one here and you'll know whether it's real and whether it's a mobile, landline, or VoIP line. Run a single number here for free, then sign up to score, dedupe, and validate entire lists with the same data that powers our API.

Want the full technical picture?

If you want to know what each validation layer actually checks (format, range, carrier, live network), what every returned field means, and where each check is worth paying for, read our complete phone number validation guide. To see which carrier a number is on today, including whether it was ported from another one, use our free carrier lookup by phone number. Before a sales call, see whether the number is on the Do Not Call Registry with our free DNC check. If all you need to know is whether a number is valid, use our free phone validator. And to see whether a mobile is switched on and reachable right now, run our free HLR lookup. To compare phone number lookup APIs on price and on what one call returns, see our ranking of the 10 best phone validation and HLR lookup APIs. And to find who a US number is listed to, see our ranking of the best free reverse phone lookups. To see only whether a number is a mobile, a landline or VoIP, use our free VoIP checker. To see whether a mobile number has moved to another network, use our free MNP checker. To see the area a US or Canadian number was assigned to, use our free phone number location lookup. To look up every number in a list from one CSV file, use our free bulk phone number checker. To see how to check a number from another country for free, read our short answer on free international phone number checkers.

How to look up and validate a phone number

Enter the phone number

Pick the country, then type or paste the number. We automatically normalize spacing, dashes, and parentheses, then parse the number into the standard E.164 format so it can be checked against the right numbering rules.

We validate it against live data

1Lookup confirms the number is correctly structured and assigned, identifies the line type (mobile, landline, or VoIP), and matches it to the carrier and country. Behind the scenes we use carrier data, HLR network checks, and FCC daily data to verify the number reflects real network status.

Read your free result

You see whether the number is valid, its line type, carrier or network, country and region, and timezone. Want the full picture? Sign up free to unlock a risk level on every lookup, plus DNC status, reachability and portability status on US and Canada numbers.

Real validity, not just format

Anyone can count digits. Our phone number checker confirms a number is assigned and follows its country's numbering plan, then verifies status against live carrier and HLR data plus FCC daily data, so a 'valid' result actually means the number can be reached.

Line type detection

See whether a number is a mobile, landline, or VoIP line. Line type is one of the strongest early signals for routing SMS versus voice, spotting throwaway VoIP numbers, and deciding which contacts are worth pursuing on your lead list.

Carrier, country, and timezone

Every lookup returns the carrier or network behind the number along with its country, region, and timezone. That context helps you call at a reasonable local hour, segment contacts by geography, and confirm a number matches the location a customer claims.

Built on the 1Lookup API

This free tool runs on the same phone validation engine as our paid API. When you outgrow one-off checks, the API and bulk validation let you verify thousands of numbers in a single run, with risk level and reachability included on every record.

Who uses this tool

Clean and verify lead lists

Marketing and sales teams waste budget dialing dead numbers. Validate a list to drop invalid, disconnected, and risky VoIP entries before a campaign, so reps spend time on contacts that can actually pick up and connect rates improve.

Verify users at signup

Developers use phone validation to catch fake or mistyped numbers during registration and checkout. Confirming a number is valid and a real mobile line before sending an OTP reduces failed messages, blocks fake accounts, and protects your SMS spend.

Improve SMS and voice deliverability

Knowing the line type and carrier up front lets you route messages correctly and skip numbers that can't receive SMS. Validating before you send keeps bounce rates low and protects your sender reputation with carriers.

Identify an unknown number

Got a missed call or a suspicious text? A quick lookup tells you the line type, carrier, and country behind a number, helping you decide whether it's a legitimate local contact or a likely spam or robocall source worth ignoring.

Frequently asked questions

Is this phone number lookup really free?

Yes. You can validate individual phone numbers here for free and see whether each is valid, plus its line type, carrier, country, region, and timezone. For the full report, including a risk level, bulk validation and, on US and Canada numbers, DNC status and reachability, create a free 1Lookup account and get a 7-day free trial.

How do I know if a phone number is valid?

A phone number is valid when it follows its country's numbering rules and is actually assigned to a carrier. Our tool checks both: it confirms the format and country plan, then verifies the number against live carrier and HLR data. If it returns 'valid,' the number is properly structured and recognized on the network.

What line types can you detect?

We identify whether a number is a mobile, landline, or VoIP line. This matters because mobile numbers can receive SMS, landlines cannot, and VoIP numbers are more common in spam and fraud. Knowing the line type up front helps you route messages and flag risky contacts before you reach out.

Do I need to include the country code?

It's strongly recommended. Adding the country code (such as +1 for the US or +61 for Australia) lets us parse the number into international E.164 format and apply the correct country's numbering rules. Without it, we'll attempt to infer the country, but results are most accurate when the full international number is provided.

What is an HLR check and why does it matter?

An HLR (Home Location Register) check queries the mobile network database that tracks subscriber status. It can confirm whether a mobile number is currently active and reachable rather than disconnected. HLR results power the real-time reachability in your full report, which is available when you sign up for a free account.

Can I validate a list of phone numbers in bulk?

Yes. While this page validates one number at a time, a free 1Lookup account unlocks bulk list validation and API access. You can upload or send thousands of numbers and get validity, line type, carrier, and risk data back for each one, which is ideal for cleaning lead lists and CRM records.

Does a lookup tell me the owner's name?

No. This is a phone validation and verification tool, not a people-search service. It returns technical details about the number itself, such as validity, line type, carrier, country, and reachability, so you can confirm whether a number is legitimate and worth contacting, without exposing personal identity information.

How do I check if a phone number is active?

Enter it above to see whether the number is valid and what kind of line it is on. Whether the line is active and reachable is part of the full report: a free 1Lookup account unlocks reachability on US and Canada numbers, and for a mobile you can ask its network directly with our free HLR lookup.

How can I tell if a phone number is mobile, landline or VoIP?

Enter it above. The result names the line type, so you can tell whether a text can reach the number. For all the line types a check can return, and what to do with each one, use our free VoIP checker.

What is the difference between a phone number lookup and a reverse phone lookup?

A phone number lookup checks the number itself: whether it is valid, its line type, carrier, country, region and time zone. A reverse phone lookup finds the person or business a US number is listed to. This page does the first; for the second, use our free reverse phone lookup.

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.

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.

See every US area code and where it is

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.

See all 33 carrier names we explain

To see who holds America's phone numbers overall, read our study Who Hands Out America's Phone Numbers in 2026.

Phone validation that goes beyond checking the digits

free phone number lookupvalidate phone number onlinecheck if phone number is validphone number carrier lookupmobile or landline checkerphone number verification APIVoIP number lookupbulk phone number validationis this number a real phone numberHLR lookup phone number

Need full results or bulk lookups?

This free tool is a rate-limited preview of the 1Lookup API. Create a free account to unlock complete reports, batch processing, and start a 7-day free trial.