Number family · Ofcom numbering snapshot published 14 Oct 2026
0345 numbers: UK-wide numbers in Ofcom’s register
What does Ofcom list for 0345 numbers?
0345 numbers are UK-wide numbers, not tied to a place. In the Ofcom snapshot published 14 Oct 2026, 738 of the 1,000 0345 number blocks are allocated (7,380,000 numbers) to 96 range holders. Calls to 03 numbers cost no more than calls to 01 and 02 numbers and count towards inclusive minutes. Check the number below.
Did not expect the call? Do not call back; contact the organisation on a number you find yourself.
| Status | Blocks |
|---|---|
| Allocated | 738 |
| Free | 3 |
| Protected | 258 |
| Quarantined | 1 |
Source: Ofcom numbering data s3.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 s3.csv d3daf36d · n = 1,000 blocks · method: block capacity from number length · release fc227d9e · CSV
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Enter a number below. The lookup runs privately in your browser and returns the Ofcom block status with a callback rule.
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Your full number does not leave this page. A lookup downloads only the relevant four-digit prefix-class file.
| Lookup | Method |
|---|---|
| Ofcom block | Private lookup in this browser |
Source: Ofcom numbering data s3.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 s3.csv d3daf36d · n = 1,000 blocks · method: block capacity from number length · release fc227d9e · CSV
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What should I do after a suspicious call from a 0345 number?
Calls to 03 numbers cost no more than calls to 01 and 02 numbers and count towards inclusive minutes.
| Step | Action |
|---|---|
| 1 | Do not call back a number you cannot identify. If it rang once and cut off, that is often a test that your line is live. |
| 2 | If the caller said they were your bank, a company or the police, hang up and phone the organisation on a number you find yourself, or call 159 for your bank. |
| 3 | Forward suspicious text messages to 7726, free of charge. |
| 4 | If you lost money or shared details, contact your bank at once and report to Action Fraud (England, Wales and Northern Ireland) or Police Scotland. |
| 5 | For unwanted marketing calls, report to the ICO and block the number on your phone. |
| 6 | Calls to 01 and 02 numbers are charged at your provider’s standard landline rate (gov.uk/call-charges). |
| 7 | Calls to 03 numbers cost no more than calls to 01 and 02 numbers and count towards inclusive minutes. |
Source: Ofcom numbering data s3.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 s3.csv d3daf36d · n = 1,000 blocks · method: block capacity from number length · release fc227d9e · CSV
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What state are 0345 number blocks in?
Of the 1,000 0345 blocks in the snapshot published 14 Oct 2026, 73.8% are allocated, against 58.1% of all non-geographic blocks. The chart shows every status Ofcom lists for this family next to all non-geographic numbers.
| Status | Blocks | Share of 0345 | Share of all non-geographic |
|---|---|---|---|
| Allocated | 738 | 73.8% | 50.9% |
| Allocated(Closed Range) | 0 | 0.0% | 7.2% |
| Free | 3 | 0.3% | 18.1% |
| Protected | 258 | 25.8% | 21.9% |
| Quarantined | 1 | 0.1% | 1.8% |
| Reserved | 0 | 0.0% | 0.1% |
Source: Ofcom numbering data s3.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 s3.csv d3daf36d · n = 1,000 blocks · method: block capacity from number length · release fc227d9e · CSV
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Which range holders have 0345 blocks?
96 range holders have allocated 0345 blocks. The table lists them alphabetically with their blocks and numbers in this family.
A holder’s name here records an Ofcom allocation only; it is not evidence about the range holder or caller.
96 range holders, alphabetical
The full alphabetical list is in the CSV.
Source: Ofcom numbering data s3.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 s3.csv d3daf36d · n = 1,000 blocks · method: block capacity from number length · release fc227d9e · CSV
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Has anything changed in 0345 blocks, and what was allocated recently?
Between the weekly Ofcom files fetched on 19 Aug 2026 and 17 Oct 2026, 1 0345 blocks changed status or holder; a block with several changes counts once. 1 0345 blocks have an allocation date in the last 12 months.
Ofcom: “Please note that transferred numbers will also be shown as ‘allocated’.” (numbering data, ofcom.org.uk, retrieved 24 Sep 2026)
| Weekly transition | Changed blocks |
|---|---|
| 2026-08-19 – 2026-08-26 | 0 |
| 2026-08-26 – 2026-09-02 | 0 |
| 2026-09-02 – 2026-09-09 | 0 |
| 2026-09-09 – 2026-09-16 | 0 |
| 2026-09-16 – 2026-09-24 | 0 |
| 2026-09-24 – 2026-09-30 | 0 |
| 2026-09-30 – 2026-10-07 | 0 |
| 2026-10-07 – 2026-10-17 | 1 |
Source: Ofcom numbering data s3.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 s3.csv d3daf36d · n = 1,000 blocks · method: block capacity from number length · release fc227d9e · CSV
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Since when have 0345 blocks been allocated?
The earliest allocation date recorded for an allocated 0345 block is 2007; 105 of 738 allocated blocks carry a date from 2020 onwards. Recorded dates are provisional: a block that moved to another provider may show the date of that move.
| Recorded years | Allocated blocks |
|---|---|
| 1994–1999 | 0 |
| 2000–2004 | 0 |
| 2005–2009 | 324 |
| 2010–2014 | 234 |
| 2015–2019 | 75 |
| 2020–2024 | 102 |
| 2025–2029 | 3 |
Source: Ofcom numbering data s3.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 s3.csv d3daf36d · n = 1,000 blocks · method: block capacity from number length · release fc227d9e · CSV
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How long are 0345 numbers?
Every 0345 block in the snapshot published 14 Oct 2026 is for 11-digit numbers, counting the leading zero.
| Number length, counting the leading zero | Blocks |
|---|---|
| 11 digits | 1,000 |
Source: Ofcom numbering data s3.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 s3.csv d3daf36d · n = 1,000 blocks · method: block capacity from number length · release fc227d9e · CSV
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Where do these numbers come from, and how do I cite this page?
Rangecheck, “0345 numbers — Ofcom numbering snapshot published 14 Oct 2026”, release fc227d9e, https://rangecheck.co.uk/number-types/0345/, retrieved 24 Sep 2026. Contains Ofcom copyright material: numbering data (ofcom.org.uk).
How to cite · Contains Ofcom copyright material
| Field | Value |
|---|---|
| Release | fc227d9e |
| Source published | 14 Oct 2026 |
| Source fetched | 2026-10-17 20:56 UTC |
| Source files | s3.csv |
Source: Ofcom numbering data s3.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 s3.csv d3daf36d · n = 1,000 blocks · method: block capacity from number length · release fc227d9e · CSV