Ofcom number block · snapshot published 14 Oct 2026
01204 583 number block: Allocated in Ofcom’s register, not evidence of who called
What does Ofcom list for the 01204 583 block?
Ofcom’s snapshot published 14 Oct 2026 lists the 01204 583 block (1,000 numbers, 11 digits long) as Allocated, held by Belgacom International Carrier Services SA; its recorded allocation date is 20 Jun 2016, which is provisional. Its status and holder did not change between 19 Aug 2026 and 17 Oct 2026. Check the number below.
Belgacom International Carrier Services SA is the Ofcom-listed range holder for this block. The listing records an allocation only; it is not evidence about the range holder or caller. A number ported to another network still shows its original range holder here.
Did not expect the call? Do not call back; contact the organisation on a number you find yourself.
Source: Ofcom numbering data s1.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 b541ed1f · n = 1 block · capacity 1,000 · release fc227d9e · CSV
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| Lookup | Method |
|---|---|
| Ofcom block | Private lookup in this browser |
Source: Ofcom numbering data s1.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 b541ed1f · n = 1 block · capacity 1,000 · release fc227d9e · CSV
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What should I do after a suspicious call from a 01204 583 number?
Did not expect the call? Do not call back; contact the organisation on a number you find yourself.
| 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 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 b541ed1f · n = 1 block · capacity 1,000 · release fc227d9e · CSV
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Has the 01204 583 block changed?
Belgacom International Carrier Services SA is the Ofcom-listed range holder for this block. The listing records an allocation only; it is not evidence about the range holder or caller. A number ported to another network still shows its original range holder here.
Its status and holder did not change between 19 Aug 2026 and 17 Oct 2026.
| Snapshot | Status | Range holder |
|---|---|---|
| 19 Aug 2026 | Allocated | Belgacom International Carrier Services SA |
| 26 Aug 2026 | Allocated | Belgacom International Carrier Services SA |
| 2 Sep 2026 | Allocated | Belgacom International Carrier Services SA |
| 9 Sep 2026 | Allocated | Belgacom International Carrier Services SA |
| 16 Sep 2026 | Allocated | Belgacom International Carrier Services SA |
| 24 Sep 2026 | Allocated | Belgacom International Carrier Services SA |
| 30 Sep 2026 | Allocated | Belgacom International Carrier Services SA |
| 7 Oct 2026 | Allocated | Belgacom International Carrier Services SA |
| 17 Oct 2026 | Allocated | Belgacom International Carrier Services SA |
Source: Ofcom numbering data s1.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 b541ed1f · n = 1 block · capacity 1,000 · release fc227d9e · CSV
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What are the neighbouring blocks?
Belgacom International Carrier Services SA is the Ofcom-listed range holder for this block. The listing records an allocation only; it is not evidence about the range holder or caller. A number ported to another network still shows its original range holder here.
The 01204 58 range is split into ten blocks. The table lists each block’s status and range holder in the snapshot published 14 Oct 2026; neighbouring allocations say nothing about who called.
| Block | Status | Range holder |
|---|---|---|
| 01204 580 | Allocated | EVE CONNECT LTD |
| 01204 581 | Allocated | Barritel Limited |
| 01204 582 | Allocated | NFON UK Ltd |
| 01204 583 (this block) | Allocated | Belgacom International Carrier Services SA |
| 01204 584 | Allocated | Gamma Telecom Holdings Limited |
| 01204 585 | Protected | Not listed |
| 01204 586 | Allocated | Media Hawk Ltd |
| 01204 587 | Allocated | Sky UK Limited |
| 01204 588 | Allocated | Colt Technology Services |
| 01204 589 | Allocated | Gamma Telecom Holdings Limited |
Source: Ofcom numbering data s1.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 b541ed1f · n = 1 block · capacity 1,000 · release fc227d9e · CSV
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Where does the 01204 583 block belong?
The 01204 583 block sits in the 01204 area code, Bolton.
| Page | What it covers |
|---|---|
| 01204 Bolton | the 01204 area code, Bolton |
Source: Ofcom numbering data s1.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 b541ed1f · n = 1 block · capacity 1,000 · release fc227d9e · CSV
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Where do these numbers come from, and how do I cite this page?
Rangecheck, “01204 583 number block — Ofcom numbering snapshot published 14 Oct 2026”, release fc227d9e, https://rangecheck.co.uk/ranges/01204583/, 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 file | s1.csv |
Source: Ofcom numbering data s1.csv, published 14 Oct 2026, fetched 2026-10-17 20:56 UTC, sha256 b541ed1f · n = 1 block · capacity 1,000 · release fc227d9e · CSV