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UK Phone Number Checker
A free UK phone number lookup for landlines, mobiles and non-geographic numbers. Check the format, area code, number type and allocated Ofcom range holder.
Important: Numbers can be ported, so the range holder may not be the current network. This tool cannot identify a subscriber, verify a caller, locate a person or detect scams. A geographic area code is not proof of the caller’s location.
How to check a UK phone number
- Enter the complete number. Use its national form beginning with 0, or its international form beginning with +44 or 0044. Spaces, brackets and hyphens are accepted.
- Select “Check number”. The tool formats the number, identifies its category and looks for the most specific matching block in our imported Ofcom files.
- Read the allocation and date together. A result shows the status and provider recorded for a number range, not proof of who uses the number today. Check the displayed CSV date for data freshness.
What does an Ofcom number lookup mean?
Ofcom allocates blocks of telephone numbers to communications providers. This checker compares a number’s prefix and recorded length with those published blocks. It does not call the number or query a live subscriber database.
Allocated means the block is assigned in the source data. It does not mean every number in the block is connected. Other statuses, such as Protected or Free, describe the block’s availability or restrictions, not whether a call costs nothing.
The range holder is not necessarily the current network. Numbers can be ported, and services may be delivered through resellers. A mobile network checker based on allocation data cannot reliably identify the network serving a ported number.
No matching range means this dataset contains no matching block for the entered number. It is not a definitive test of whether the number exists. An unsupported length or prefix is reported separately so you can check for typing errors.
UK phone number prefixes and call costs
Use the prefix to understand the number type, then check your own calling plan. This guide gives general rules, not a price quote.
| Prefix | Type and guidance |
|---|---|
| 01 / 02 | Geographic landlinesArea codes are linked to numbering areas, such as 020 for London and 0161 for Manchester. They do not prove where a caller is located. Calls often fall within geographic allowances. |
| 03 | UK-wide non-geographicIncludes 0300, 0333, 0345 and 0370. Calls cost no more than 01/02 calls and count towards inclusive geographic minutes. They are not automatically free outside your allowance. |
| 055 / 056 | Corporate and location-independent055 is corporate numbering; 056 is location-independent numbering, often associated with VoIP. Check your tariff rather than assuming ordinary landline rates. |
| 071–075 / 077–079 | Mobile numbersMost familiar UK mobile numbers use these ranges. Some +44 mobile ranges serve Crown Dependencies; your UK bundle may exclude them. |
| 070 / 076 | Personal numbering and paging070 is personal numbering, not ordinary mobile service. 076 is generally paging, with 07624 used for Isle of Man mobiles. Charges can differ from standard mobile calls. |
| 0800 / 0808 | FreephoneFree to call from UK consumer landlines and mobiles. International calls and other calling arrangements can have different rules. |
| 084 / 087 | Service numbersUsually charged as your provider’s access charge plus the organisation’s service charge. Confirm both rather than treating the number as a standard landline. |
| 09 | Premium-rate servicesAccess and service charges apply. Check the advertised price and your provider’s tariff before calling. |
Official sources and business phone guidance
Provided by Omega IT. Allocation results use Ofcom’s published numbering data; call guidance is based on Ofcom’s call costs guide. This independent tool is not operated or endorsed by Ofcom.
Phone number checker FAQs
What does this UK phone number checker tell me?
It formats a number in national and +44 international form, identifies the number type and geographic area code where applicable, and matches it against Ofcom's published number-block allocations. A match describes the range, not the individual subscriber.
Does the range holder identify the current network?
Not necessarily. The range holder is the communications provider shown in Ofcom's allocation data. Numbers can be ported or supplied through resellers, so the current serving provider may be different.
Can it tell me who owns a number or whether it is a scam?
No. Ofcom does not publish subscriber identities or whether individual numbers are active. This checker cannot prove that a caller is genuine or identify scam calls. Caller ID can also be spoofed.
How often is the source data updated?
Ofcom aims to publish its numbering files every Wednesday. We attempt a refresh after Wednesday publication and retry when data is older than a week, while this app is running. Failed downloads do not replace the last good dataset. The checker shows the CSV file date and warns when data is older than 14 days.
Can I enter +44 or 0044 numbers?
Yes. Enter a complete number starting with 0, +44 or 0044. Spaces, brackets and hyphens are accepted. Short codes, extensions and numbers outside the +44 numbering plan are not supported.
Are the call charges exact?
No. We provide general guidance by number type, not an exact price quote. Your tariff, allowances and destination matter. Crown Dependency ranges use +44 but may be excluded from UK bundles. Confirm charges with your provider.
Do you store numbers I check?
The checker does not save entered numbers or include them in application lookup logs. The lookup is performed against our copy of the public dataset, not sent to an external phone lookup service. Normal website traffic logging still applies.
How do I write a UK phone number with +44?
Replace the first 0 with +44. For example, 0800 254 5458 becomes +44 800 254 5458. Do not normally keep the initial 0 when dialling internationally. This checker also accepts the common written notation +44 (0)800 254 5458 and normalises it.
Are 0333 and 0345 numbers free to call?
They are not freephone numbers. Like other 03 numbers, they cost no more than 01 or 02 calls and are included in allowances on the same basis. If you have no inclusive minutes, or have used them up, your provider’s normal geographic call rate applies.
Are 0800 and 0808 numbers free from mobiles?
Yes, calls to 0800 and 0808 numbers are free from UK consumer mobiles and landlines. Calls from abroad or under other calling arrangements can differ, so check with your provider if those circumstances apply.
Is a number beginning 070 a mobile number?
No. 070 is personal numbering, often used to forward calls to another destination. Do not assume it is covered by your mobile allowance. 076 is generally paging, although 07624 is used for Isle of Man mobiles.
Can I check a UK mobile number’s network?
You can check the provider allocated its Ofcom number block. That is not a live network lookup: porting and reseller arrangements mean the current serving network may be different. The result cannot confirm that the mobile number is active.
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