Area code 01533 · no place listed in Ofcom's area-code table · snapshot published 23 Sep 2026
01533: not an active UK area code
What does the 01533 register show?
01533 is not an active UK area code. A caller ID showing 01533 is not shown as allocated in Ofcom's numbering snapshot published 23 Sep 2026. Do not rely on it; end the call and contact the organisation using an independently verified number. Nearest active codes: 01534 Jersey, 01531 Ledbury, 01535 Keighley.
In the Ofcom numbering snapshot published 23 Sep 2026, its 1,000,000-number space is marked Protected: no block is allocated, and Ofcom's area-code table lists no place for it.
Allocated blocks: 0 (no allocated blocks) · Listed holders: 0 · Number space: 1,000,000, marked Protected · Changes since 19 Aug 2026: 0
A caller ID showing 01533 is not shown as allocated in the register. Do not rely on it, and do not call back.
01533 numbers: 01533 followed by six digits · 0 blocks with an allocation date in the last 12 months
Snapshot published 23 Sep 2026, fetched 2026-09-24 18:00 UTC · release 6d60d6b0 · this page: unchanged in this release
| Place | Source |
|---|---|
| No place listed | Ofcom area-code table |
| Active code | Place | Allocated numbers |
|---|---|---|
| 01534 | Jersey | 410,000 |
| 01531 | Ledbury | 405,000 |
| 01535 | Keighley | 452,000 |
| 01530 | Coalville | 443,000 |
Source: Ofcom numbering data s1.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 002caad0 · n = 1 blocks · method: block capacity from number length · release 6d60d6b0 · CSV
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Check the number privately
Enter a number below. The lookup runs privately in your browser and returns the Ofcom block status with a callback rule.
Not evidence about the range holder or caller.
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Enter the number that called
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 s1.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 002caad0 · n = 1 blocks · method: local prefix shard · release 6d60d6b0 · CSV
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What should I do after a suspicious call from a 01533 number?
| 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). |
Source: Ofcom numbering data s1.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 002caad0 · n = 1 blocks · method: aggregate register blocks by area code · release 6d60d6b0 · CSV
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Who holds the 01533 number ranges?
No allocated blocks in the 23 Sep 2026 snapshot.
Source: Ofcom numbering data s1.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 002caad0 · n = 1 blocks · method: aggregate register blocks by area code · release 6d60d6b0 · CSV
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Is a 01533 number real, and what does “Quarantined” mean?
All 1,000,000 numbers in 01533 are marked Protected in the snapshot published 23 Sep 2026: the range is held back and none of it is allocated to a provider.
| Status | Numbers | Blocks |
|---|---|---|
| Allocated | 0 | 0 |
| Protected | 1,000,000 | 1 |
| Free | 0 | 0 |
| Quarantined | 0 | 0 |
| Other (Reserved or Designated) | 0 | 0 |
Source: Ofcom numbering data s1.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 002caad0 · n = 1 blocks · method: aggregate register blocks by area code · release 6d60d6b0 · CSV
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Has anything changed in the 01533 ranges, and which blocks were allocated recently?
No allocated blocks in the 23 Sep 2026 snapshot.
Source: Ofcom numbering data s1.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 002caad0 · n = 1 blocks · method: aggregate register blocks by area code · release 6d60d6b0 · CSV
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Since when have 01533 numbers been allocated?
No allocated blocks in the 23 Sep 2026 snapshot.
Source: Ofcom numbering data s1.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 002caad0 · n = 1 blocks · method: aggregate register blocks by area code · release 6d60d6b0 · CSV
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How many digits does a 01533 number have?
No allocated blocks in the 23 Sep 2026 snapshot.
Source: Ofcom numbering data s1.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 002caad0 · n = 1 blocks · method: aggregate register blocks by area code · release 6d60d6b0 · CSV
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Which area codes are next to 01533 in the numbering plan?
Codes next to 01533 by number, not necessarily nearby on the map: the Ofcom table carries no coordinates.
| Code | Places | Allocated numbers | Listed holders |
|---|---|---|---|
| 01534 | Jersey | 410,000 | 6 |
| 01531 | Ledbury | 405,000 | 86 |
| 01535 | Keighley | 452,000 | 93 |
| 01530 | Coalville | 443,000 | 92 |
Source: Ofcom numbering data s1.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 002caad0 · n = 1 blocks · method: aggregate register blocks by area code · release 6d60d6b0 · CSV
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Where do these numbers come from, and how do I cite this page?
Contains Ofcom copyright material: Telephone area codes (ofcom.org.uk), retrieved 24 Sep 2026. Contains public sector information licensed under the Open Government Licence v3.0.
| Field | Value |
|---|---|
| Release | 6d60d6b0 |
| Source published | 23 Sep 2026 |
| Source fetched | 2026-09-24 18:00 UTC |
How to cite · Rangecheck, “01533 area code — Ofcom numbering snapshot published 23 Sep 2026”, release 6d60d6b0, https://rangecheck.co.uk/area-codes/01533/, retrieved 24 Sep 2026. Contains Ofcom copyright material: numbering data and Telephone area codes (ofcom.org.uk). Contains Ofcom copyright material: Telephone area codes (ofcom.org.uk), retrieved 24 Sep 2026. Contains public sector information licensed under the Open Government Licence v3.0.
Source: Ofcom numbering data s1.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 002caad0 · n = 1 blocks · method: aggregate register blocks by area code · release 6d60d6b0 · CSV