This free UK carrier lookup shows which carrier a UK number is on today.
A carrier lookup names the phone company a number is with today and tells you whether the line is mobile, landline or VoIP. Enter a UK number above, with the UK already selected, and 1Lookup's free tool returns the carrier or network it is on now where the network lists one, the line type and the country. It needs no signup.
Pick the country, then enter the number without the country code.
Free & rate-limited. No signup required to try.
Also try the UK phone number checker or the UK HLR lookup.
- Country code
- +44
- Mobile numbers
- 10 digits after +44, or 11 written at home, starting 07
- Landlines
- 10 digits after +44, starting 01 or 02, such as +44Â 20Â XXXXÂ XXXX
- Written at home
- 07400 123456
- Written for apps and SMS
- +447400123456
- The result shows
- The carrier or network where the network lists one, the line type, the country and the region
The digits of a UK number show its country and shape, and the carrier lookup shows the network it is on now.
Read the digits for the format and the lookup for the carrier. These are the UK's rules from the numbering data.
| What you want to know | What the digits show | What the carrier lookup shows |
|---|---|---|
| Is it a mobile? | A mobile number has 10 digits after +44, or 11 written at home, starting 07. | The line type: mobile, landline or VoIP. |
| Which carrier is it with? | The digits give a range of numbers, not a carrier name. | The carrier or network the number is on now, where the network lists one. |
| Where is it from? | The country code +44 is the UK's. | The country, and the region where the record has one. |
A UK mobile number is +44 followed by 10 digits, and the first one is 7.
Written with the country code
- +44Country code
- 7Mobile start
- 400 1234569 more digits
Written at home
- 0Replaces +44
- 7Mobile start
- 400 1234569 more digits
The +44 and the 0 do the same job, so a number is never written with both.
A carrier lookup for a UK number reads the number's format first and then its carrier record.
This is the path one lookup takes. A number can be written correctly and still sit with no carrier name on record, so the result says when the network lists none.
- You enter the numberType it the way it is written at home, such as 07400 123456, or paste it with +44.
- Its format is checkedEach type of number has its own rules. A mobile needs 10 digits after +44 and starts with 07 at home.
- Its carrier record is read1Lookup looks the number up in carrier data to find the network that serves it now and its line type.Nothing is sent to the number, so it never rings and its owner is never told.
- You see the carrier and the line typeWith the country and the region, and a note when the network lists no carrier for the number.
A UK mobile number has 10 digits after +44 and starts with 07, so any other length is not a valid mobile.
These lengths come from the numbering data for the UK. A mobile number has 11 digits when it is written at home with its 0.
| Number type | Starts with at home | Digits after +44 | Written at home |
|---|---|---|---|
| Mobile | 07 | 10 | 07400 123456 |
| Landline | 01 or 02 | 10 | 020 XXXX XXXX |
Three common mistakes make a UK number fail the check, and each one is quick to fix.
Keeping the 0 after +44 adds a digit.
The 0 is only for dialing inside the UK, so +44 07400 123456 is wrong. Drop the 0 and write +44 7400 123456.
Typing too few or too many digits makes a number invalid.
A mobile number has 10 digits after +44. With 9 or 11 it cannot be a valid mobile, so look for a missing or doubled digit.
Leaving the wrong country selected changes how the number is read.
The lookup reads a number by the rules of the country selected above, so keep the UK selected for a +44 number. Paste a number with its + and country code and the country is read from the number itself.
These are the questions people ask most about carrier lookups for UK phone numbers.
How do I find the carrier of a UK phone number?
Enter the number in the box above with the UK selected. Type it the way it is written at home, such as 07400 123456, or with the country code, such as +447400123456. The free tool returns the carrier or network the number is on now where the network lists one, the line type and the country.
How many digits is a UK mobile number?
A mobile number has 10 digits after +44, or 11 written at home, starting 07.
Can the first digits of a UK number tell me its carrier?
No. The digits help show whether a number is a mobile, since a mobile has 10 digits after +44, or 11 written at home, starting 07, but they do not name a carrier. The carrier lookup shows the network a number is on now.
Does the carrier lookup show whether a UK number was ported?
Not in the free result. The carrier lookup shows the ported flag for US and Canada numbers only. The free HLR lookup for the UK has a Ported row for a mobile number, and it reads Yes, No or Unknown.
Why does the carrier come back as Not available?
Some numbers, landlines among them, come back with no carrier name because the network does not list one. The line type and the country still show.
Does the carrier lookup show whether a UK mobile number is switched on?
No. It names the network and the line type. The free HLR lookup asks the network whether a mobile number is switched on and reachable right now.
Can I look up the carrier of a whole list of UK phone numbers?
Yes. This free tool checks one number at a time. A 7-day free trial opens CSV upload and the API, at 1 credit a number.
Does the person know I looked up their number?
No. The lookup reads records only. No call or text goes to the number, so its owner is never told.
You can look up numbers from other countries on their own pages.
These free tools answer the next question about a number.
- UK HLR lookupCheck whether a UK mobile number is switched on and reachable right now.
- UK phone number checkerCheck whether a UK number is valid before you look it up.
- Carrier Lookup for any countryThe same lookup with the country picker open to every country.
- The +44 country code pageHow to dial the UK, the time there now and the landline places.
- Line type lookupSee whether a number is a mobile, a landline or VoIP.
- Carrier lookup APIRun the same lookup from your own software, one request per number.
Sources: Google's libphonenumber numbering data for lengths, mobile starts and landline starts, as of September 24, 2026; the ITU list of country codes.