UK area code
01255 area code — Clacton-on-Sea
01255 is Ofcom’s Clacton-on-Sea numbering area, in Essex, East of England England. 100 phone companies hold its 166 allocated number blocks. Its numbers are written like 01255 234 567. The nearest other codes are 01206 Colchester (20 km) and 01394 Felixstowe (24 km).
01255 at a glance
- Ofcom area name
- Clacton-on-Sea
- County
- Essex
- Council area
- Essex
- Region
- East of England England
- Number format
- 01255 234 567 (4+6)
- Local calls
- Full number recommended
- Current code since
- 1995 (previously 0255)
- Allocated blocks
- 166 of 406 (41%) across 100 providers
- Newest block
- 26 January 2026 (1 in the last 12 months)
Sources: Ofcom numbering data (weekly) and area-code list, Ofcom Numbering Plan, ONS geography.
If a 01255 number called you
No clear pattern in reports for these numbers yet. If a call worried you:
- 1
Call back on a number you trust
If a caller says they're your bank, HMRC, a courier or a council, hang up and ring the organisation on the number from its website or your statement, never the number that called you. Caller ID can be faked.
- 2
Forward it to 7726
On a mobile, copy the caller's number from your recent calls and text it to 7726 (it spells SPAM). Scam texts can be forwarded to 7726 as they are. It's free, and your network uses the reports to investigate and block numbers.
- 3
Stop sales calls
Register your landline and mobile free with the Telephone Preference Service (0345 070 0707). Legitimate UK marketers must check it; calls should drop within 28 days. It won't stop scammers.
- 4
If you lost money or shared details
Call your bank on the number on your card (or 159 to reach most UK banks safely), then report it to Report Fraud online or on 0300 123 2040. Report Fraud replaced Action Fraud on 4 December 2025 for England, Wales and Northern Ireland; in Scotland call Police Scotland on 101.
01255 history and number format
Number format: Numbers on 01255 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01255 234 567.
Before 1995: 01255 took its current form at PhONEday on 16 April 1995, when a "1" was inserted into every UK geographic code — before that the area dialled 0255.
Local dialling: Traditionally not from another 01255 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01255 first always works, and mobiles always need it.
Allocation record: the oldest number block still visible on 01255 was allocated on 15 July 1994, and the most recent on 26 January 2026. 1 block was allocated in the last 12 months — newly-activated ranges with no call history, which is worth knowing when an unfamiliar 01255 number rings (see the weekly numbering changelog for every new allocation.)
Phone companies holding 01255 numbers
Every Ofcom range holder with blocks on 01255, by allocated blocks. The holder is the company Ofcom allocated the block to; a number can since have been ported to another provider (see range holder vs current provider).
| Range holder | Allocated | All blocks | First block | Latest block |
|---|---|---|---|---|
| BT | 21 | 21 | 15 July 1994 | 19 February 2024 |
| Sky UK Limited | 13 | 13 | 21 June 2013 | 18 June 2021 |
| GCI Network Solutions Limited | 11 | 11 | 20 April 2017 | 26 February 2024 |
| Vodafone Ltd (C&W) | 8 | 8 | 3 October 2013 | 3 October 2013 |
| TalkTalk Communications Limited | 7 | 7 | 18 January 2012 | 14 December 2017 |
| Virgin Media Limited | 5 | 5 | 28 June 2012 | 28 June 2012 |
| Digital Space Group Limited | 3 | 3 | 29 November 2007 | 12 April 2016 |
| Barritel Limited | 2 | 2 | 8 October 2008 | 2 December 2022 |
| Colt Technology Services | 2 | 2 | 21 October 2011 | 24 August 2018 |
| Digitech Solutions Global Limited | 2 | 2 | 23 April 2010 | 22 June 2012 |
| Fuse 2 Communications Ltd | 2 | 2 | 4 July 2017 | 22 January 2024 |
| IOVOX Limited | 2 | 2 | 3 April 2012 | 28 March 2017 |
| (AQ) LIMITED | 1 | 1 | 17 October 2011 | 17 October 2011 |
| 24 Seven Cloud Communications Ltd | 1 | 1 | 17 January 2020 | 17 January 2020 |
| 8x8 Communications UK Limited | 1 | 1 | 26 March 2012 | 26 March 2012 |
| AQL Wholesale Ltd | 1 | 1 | 21 June 2006 | 21 June 2006 |
| Adepteo Limited | 1 | 1 | 16 January 2017 | 16 January 2017 |
| Alnitak GmbH | 1 | 1 | 6 January 2017 | 6 January 2017 |
| Andrews & Arnold (Numbers) Ltd | 1 | 1 | 27 February 2009 | 27 February 2009 |
| Atomstream Limited | 1 | 1 | 25 February 2010 | 25 February 2010 |
| Belgacom International Carrier Services SA | 1 | 1 | 14 October 2019 | 14 October 2019 |
| Bicom Systems EURL | 1 | 1 | 2 March 2012 | 2 March 2012 |
| Bink Networks Ltd | 1 | 1 | 29 March 2023 | 29 March 2023 |
| Buzz Networks Limited | 1 | 1 | 1 March 2010 | 1 March 2010 |
| CFL Communications Ltd | 1 | 1 | 8 July 2009 | 8 July 2009 |
| Ccpro Solutions Limited | 1 | 1 | 19 February 2013 | 19 February 2013 |
| Citrus Telecommunications Ltd | 1 | 1 | 11 April 2006 | 11 April 2006 |
| Commi Holdings Limited | 1 | 1 | 21 November 2016 | 21 November 2016 |
| Content Guru Limited | 1 | 1 | 12 October 2012 | 12 October 2012 |
| DIDWW Ireland Limited | 1 | 1 | 27 January 2020 | 27 January 2020 |
Showing the 30 largest of 100 holders.
Openreach exchanges at Clacton-on-Sea
Exchanges Openreach lists at this location in its copper stop-sell programme, with the date new copper orders stop.
- Holland on Sea EAHOLStop sell 04-Jun-24 · Tranche 12
All number blocks on 01255first 200 of 406, by prefix
| Prefix | Status | Range holder |
|---|---|---|
| +44 125500 | Protected | — |
| +44 125501 | Protected | — |
| +44 125502 | Protected | — |
| +44 125503 | Protected | — |
| +44 125504 | Protected | — |
| +44 125505 | Protected | — |
| +44 125506 | Protected | — |
| +44 125507 | Protected | — |
| +44 125508 | Protected | — |
| +44 125509 | Protected | — |
| +44 125510 | Protected | — |
| +44 125511 | Protected | — |
| +44 125512 | Protected | — |
| +44 125513 | Protected | — |
| +44 125514 | Protected | — |
| +44 125515 | Protected | — |
| +44 125516 | Protected | — |
| +44 125517 | Protected | — |
| +44 125518 | Protected | — |
| +44 125519 | Protected | — |
| +44 125520 | Allocated | BT |
| +44 1255210 | Allocated | Linear Telecoms Limited |
| +44 1255211 | Allocated | M247 Ltd |
| +44 1255212 | Allocated | Sky UK Limited |
| +44 1255213 | Free | — |
| +44 1255214 | Allocated | Sky UK Limited |
| +44 1255215 | Free | — |
| +44 1255216 | Allocated | I.T Communications Limited |
| +44 1255217 | Allocated | Alnitak GmbH |
| +44 1255218 | Allocated | Adepteo Limited |
| +44 1255219 | Protected | — |
| +44 125522 | Allocated | BT |
| +44 125523 | Allocated | BT |
| +44 125524 | Allocated | BT |
| +44 125525 | Allocated | BT |
| +44 125526 | Allocated | Flextel Limited |
| +44 125527 | Protected | — |
| +44 125528 | Allocated | TGL Services (UK) Ltd |
| +44 1255290 | Free | — |
| +44 1255291 | Free | — |
| +44 1255292 | Free | — |
| +44 1255293 | Free | — |
| +44 1255294 | Free | — |
| +44 1255295 | Free | — |
| +44 1255296 | Free | — |
| +44 1255297 | Protected | — |
| +44 1255298 | Protected | — |
| +44 1255299 | Protected | — |
| +44 125530 | Protected | — |
| +44 1255310 | Protected | — |
| +44 1255311 | Protected | — |
| +44 1255312 | Protected | — |
| +44 1255313 | Protected | — |
| +44 1255314 | Protected | — |
| +44 1255315 | Protected | — |
| +44 1255316 | Protected | — |
| +44 1255317 | Allocated | TalkTalk Communications Limited |
| +44 1255318 | Allocated | TalkTalk Communications Limited |
| +44 1255319 | Allocated | TalkTalk Communications Limited |
| +44 125532 | Allocated | Voiceflex Limited |
| +44 125533 | Allocated | (AQ) LIMITED |
| +44 125534 | Allocated | VoIP-Un Limited |
| +44 125535 | Allocated | Digital Space Group Limited |
| +44 1255360 | Allocated | Voxbone SA |
| +44 1255361 | Protected | — |
| +44 1255362 | Protected | — |
| +44 1255363 | Protected | — |
| +44 1255364 | Protected | — |
| +44 1255365 | Protected | — |
| +44 1255366 | Protected | — |
| +44 1255367 | Protected | — |
| +44 1255368 | Protected | — |
| +44 1255369 | Protected | — |
| +44 1255370 | Protected | — |
| +44 1255371 | Protected | — |
| +44 1255372 | Protected | — |
| +44 1255373 | Protected | — |
| +44 1255374 | Protected | — |
| +44 1255375 | Protected | — |
| +44 1255376 | Protected | — |
| +44 1255377 | Allocated | Digital Space Group Limited |
| +44 1255378 | Protected | — |
| +44 1255379 | Protected | — |
| +44 1255380 | Allocated | GCI Network Solutions Limited |
| +44 1255381 | Allocated | GCI Network Solutions Limited |
| +44 1255382 | Allocated | GCI Network Solutions Limited |
| +44 1255383 | Allocated | GCI Network Solutions Limited |
| +44 1255384 | Allocated | GCI Network Solutions Limited |
| +44 1255385 | Allocated | GCI Network Solutions Limited |
| +44 1255386 | Allocated | GCI Network Solutions Limited |
| +44 1255387 | Allocated | GCI Network Solutions Limited |
| +44 1255388 | Allocated | GCI Network Solutions Limited |
| +44 1255389 | Allocated | GCI Network Solutions Limited |
| +44 125539 | Allocated | Verizon UK Limited |
| +44 125540 | Allocated | Vodafone Ltd (C&W) |
| +44 125541 | Allocated | AQL Wholesale Ltd |
| +44 125542 | Allocated | BT |
| +44 125543 | Allocated | BT |
| +44 125544 | Allocated | Gamma Telecom Holdings Limited |
| +44 125545 | Allocated | Citrus Telecommunications Ltd |
| +44 125546 | Protected | — |
| +44 125547 | Allocated | BT |
| +44 1255480 | Allocated | Digitech Solutions Global Limited |
| +44 1255481 | Allocated | IOVOX Limited |
| +44 1255482 | Allocated | Ziron Limited |
| +44 1255483 | Allocated | TalkTalk Communications Limited |
| +44 1255484 | Allocated | Sky UK Limited |
| +44 1255485 | Allocated | Content Guru Limited |
| +44 1255486 | Allocated | Ccpro Solutions Limited |
| +44 1255487 | Allocated | Sky UK Limited |
| +44 1255488 | Protected | — |
| +44 1255489 | Allocated | ICC Networks Ltd |
| +44 1255490 | Protected | — |
| +44 1255491 | Protected | — |
| +44 1255492 | Protected | — |
| +44 1255493 | Protected | — |
| +44 1255494 | Protected | — |
| +44 1255495 | Protected | — |
| +44 1255496 | Protected | — |
| +44 1255497 | Protected | — |
| +44 1255498 | Protected | — |
| +44 1255499 | Protected | — |
| +44 125550 | Allocated | BT |
| +44 1255510 | Protected | — |
| +44 1255511 | Protected | — |
| +44 1255512 | Protected | — |
| +44 1255513 | Protected | — |
| +44 1255514 | Allocated | Six Degrees Technology Group Limited |
| +44 1255515 | Protected | — |
| +44 1255516 | Protected | — |
| +44 1255517 | Protected | — |
| +44 1255518 | Protected | — |
| +44 1255519 | Protected | — |
| +44 1255520 | Allocated | VoiceHost Limited |
| +44 1255521 | Protected | — |
| +44 1255522 | Protected | — |
| +44 1255523 | Protected | — |
| +44 1255524 | Protected | — |
| +44 1255525 | Protected | — |
| +44 1255526 | Protected | — |
| +44 1255527 | Protected | — |
| +44 1255528 | Protected | — |
| +44 1255529 | Protected | — |
| +44 1255530 | Protected | — |
| +44 1255531 | Protected | — |
| +44 1255532 | Protected | — |
| +44 1255533 | Protected | — |
| +44 1255534 | Protected | — |
| +44 1255535 | Protected | — |
| +44 1255536 | Protected | — |
| +44 1255537 | Protected | — |
| +44 1255538 | Protected | — |
| +44 1255539 | Protected | — |
| +44 125554 | Protected | — |
| +44 125555 | Allocated | BT |
| +44 1255560 | Allocated | DRD Communications Limited |
| +44 1255561 | Protected | — |
| +44 1255562 | Protected | — |
| +44 1255563 | Allocated | Hello Telecom (UK) Limited |
| +44 1255564 | Allocated | Invoco Ltd |
| +44 1255565 | Protected | — |
| +44 1255566 | Protected | — |
| +44 1255567 | Allocated | Orbtalk Limited |
| +44 1255568 | Allocated | Colt Technology Services |
| +44 1255569 | Allocated | Sky UK Limited |
| +44 125557 | Allocated | GCI Network Solutions Limited |
| +44 125558 | Allocated | TTNC Limited |
| +44 125559 | Allocated | Served Up Limited |
| +44 1255600 | Protected | — |
| +44 1255601 | Allocated | Virgin Media Limited |
| +44 1255602 | Allocated | Virgin Media Limited |
| +44 1255603 | Allocated | Virgin Media Limited |
| +44 1255604 | Protected | — |
| +44 1255605 | Protected | — |
| +44 1255606 | Protected | — |
| +44 1255607 | Allocated | Virgin Media Limited |
| +44 1255608 | Protected | — |
| +44 1255609 | Allocated | Virgin Media Limited |
| +44 1255610 | Allocated | Sky UK Limited |
| +44 1255611 | Allocated | ICUK Computing Services Limited |
| +44 1255612 | Allocated | Dial 9 Communications Limited |
| +44 1255613 | Allocated | 24 Seven Cloud Communications Ltd |
| +44 1255614 | Allocated | DIDWW Ireland Limited |
| +44 1255615 | Allocated | Colt Technology Services |
| +44 1255616 | Allocated | EVE CONNECT LTD |
| +44 1255617 | Allocated | Spitfire Network Services Limited |
| +44 1255618 | Allocated | Belgacom International Carrier Services SA |
| +44 1255619 | Allocated | Orbital Net Limited |
| +44 1255620 | Allocated | Vodafone Ltd (C&W) |
| +44 1255621 | Allocated | Vodafone Ltd (C&W) |
| +44 1255622 | Allocated | Vodafone Ltd (C&W) |
| +44 1255623 | Allocated | Vodafone Ltd (C&W) |
| +44 1255624 | Allocated | Vodafone Ltd (C&W) |
| +44 1255625 | Allocated | Vodafone Ltd (C&W) |
| +44 1255626 | Allocated | Vodafone Ltd (C&W) |
| +44 1255627 | Protected | — |
| +44 1255628 | Protected | — |
| +44 1255629 | Protected | — |
| +44 1255630 | Protected | — |
| +44 1255631 | Protected | — |
Related lookups
- 01206 Colchester20 km away
- 01394 Felixstowe24 km away
- 01473 Ipswich30 km away
- 01621 Maldon33 km away
- BT21 allocated blocks on 01255
- Sky UK Limited13 allocated blocks on 01255
- GCI Network Solutions Limited11 allocated blocks on 01255
- All UK towns A–ZDialling codes by town
- More Essex codesSame region
- All UK area codesBrowse every 01/02 dialling code
- Lookup any UK numberFree reverse phone lookup
- UK area codes explainedCornerstone guide
- 020 London numbers explainedCornerstone guide
- 0330 numbers explainedCornerstone guide
- How Ofcom allocates UK phone numbersCornerstone guide
FAQs about 01255
Where is area code 01255?
01255 is Ofcom's Clacton-on-Sea numbering area, in Essex, East of England England. Its exchange town is in Essex. From abroad, drop the 0 and dial +44 1255.
Do I need to dial 01255 for a local call?
Traditionally not from another 01255 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01255 first always works, and mobiles always need it.
How are 01255 numbers written?
Numbers on 01255 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01255 234 567. From abroad the leading zero is dropped: +44 1255 then the local number.
What was the 01255 area code before?
01255 took its current form at PhONEday on 16 April 1995, when a "1" was inserted into every UK geographic code — before that the area dialled 0255. Old signage or stationery showing 0255 refers to the same Clacton-on-Sea numbers.
Which phone companies hold 01255 numbers?
Ofcom lists 100 providers with allocated blocks on 01255. The largest are BT with 21 of the 166 allocated blocks, Sky UK Limited with 13 of the 166 allocated blocks and GCI Network Solutions Limited with 11 of the 166 allocated blocks. Numbers can be ported, so a number's current provider may differ from the block's holder.
Which area codes are next to 01255?
By distance between exchange towns, the nearest other codes are 01206 Colchester (20 km), 01394 Felixstowe (24 km), 01473 Ipswich (30 km) and 01621 Maldon (33 km).
How do I report a scam call from a 01255 number?
On a mobile, text the caller's number to 7726 (free). If you lost money or shared details, call your bank and report it to Report Fraud (0300 123 2040), which replaced Action Fraud in December 2025. Unwanted sales calls go to the ICO after registering with the Telephone Preference Service.