UK area code
01550 area code — Llandovery
01550 is Ofcom’s Llandovery numbering area, in Carmarthenshire, Wales. 81 phone companies hold its 96 allocated number blocks. Its numbers are written like 01550 234 567. The nearest other codes are 01591 Llanwrtyd Wells (16 km) and 01558 Llandeilo (18 km).
01550 at a glance
- Ofcom area name
- Llandovery
- Council area
- Carmarthenshire
- Country
- Wales
- Number format
- 01550 234 567 (4+6)
- Local calls
- Full number recommended
- Current code since
- 1995 (previously 0550)
- Allocated blocks
- 96 of 442 (22%) across 81 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 01550 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.
01550 history and number format
Number format: Numbers on 01550 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01550 234 567.
Before 1995: 01550 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 0550.
Local dialling: Traditionally not from another 01550 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01550 first always works, and mobiles always need it.
Allocation record: the oldest number block still visible on 01550 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 01550 number rings (see the weekly numbering changelog for every new allocation.)
Phone companies holding 01550 numbers
Every Ofcom range holder with blocks on 01550, 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 |
|---|---|---|---|---|
| Gamma Telecom Holdings Limited | 8 | 8 | 7 February 2013 | 7 February 2013 |
| BT | 5 | 5 | 15 July 1994 | 15 July 1994 |
| Digital Space Group Limited | 2 | 2 | 14 May 2008 | 15 March 2016 |
| Digitech Solutions Global Limited | 2 | 2 | 27 April 2010 | 25 June 2012 |
| Fuse 2 Communications Ltd | 2 | 2 | 3 July 2017 | 22 January 2024 |
| TalkTalk Communications Limited | 2 | 2 | 20 January 2012 | 20 January 2012 |
| (AQ) LIMITED | 1 | 1 | 19 October 2011 | 19 October 2011 |
| 24 Seven Cloud Communications Ltd | 1 | 1 | 17 January 2020 | 17 January 2020 |
| 8x8 Communications UK Limited | 1 | 1 | 30 March 2012 | 30 March 2012 |
| AQL Wholesale Ltd | 1 | 1 | 2 January 2008 | 2 January 2008 |
| Adepteo Limited | 1 | 1 | 21 December 2016 | 21 December 2016 |
| Alnitak GmbH | 1 | 1 | 26 October 2016 | 26 October 2016 |
| Andrews & Arnold (Numbers) Ltd | 1 | 1 | 19 March 2009 | 19 March 2009 |
| Atomstream Limited | 1 | 1 | 12 May 2010 | 12 May 2010 |
| Barritel Limited | 1 | 1 | 15 August 2006 | 15 August 2006 |
| Bink Networks Ltd | 1 | 1 | 3 April 2023 | 3 April 2023 |
| CFL Communications Ltd | 1 | 1 | 13 July 2009 | 13 July 2009 |
| Calltracks Limited | 1 | 1 | 31 January 2014 | 31 January 2014 |
| Colt Technology Services | 1 | 1 | 20 June 2016 | 20 June 2016 |
| Content Guru Limited | 1 | 1 | 12 October 2012 | 12 October 2012 |
| Convergence Group (wireless) Networks Limited | 1 | 1 | 21 May 2019 | 21 May 2019 |
| Dial 9 Communications Limited | 1 | 1 | 10 December 2019 | 10 December 2019 |
| EVE CONNECT LTD | 1 | 1 | 15 June 2022 | 15 June 2022 |
| Flextel Limited | 1 | 1 | 24 October 2005 | 24 October 2005 |
| GCI Network Solutions Limited | 1 | 1 | 20 December 2023 | 20 December 2023 |
| Hello Telecom (UK) Limited | 1 | 1 | 10 November 2011 | 10 November 2011 |
| I.T Communications Limited | 1 | 1 | 25 April 2017 | 25 April 2017 |
| ICC Networks Ltd | 1 | 1 | 17 April 2012 | 17 April 2012 |
| ICUK Computing Services Limited | 1 | 1 | 17 June 2020 | 17 June 2020 |
| INTELLIGENT EXCHANGES LIMITED | 1 | 1 | 26 January 2026 | 26 January 2026 |
Showing the 30 largest of 81 holders.
All number blocks on 01550first 200 of 442, by prefix
| Prefix | Status | Range holder |
|---|---|---|
| +44 155000 | Protected | — |
| +44 155001 | Protected | — |
| +44 155002 | Protected | — |
| +44 155003 | Protected | — |
| +44 155004 | Protected | — |
| +44 155005 | Protected | — |
| +44 155006 | Protected | — |
| +44 155007 | Protected | — |
| +44 155008 | Protected | — |
| +44 155009 | Protected | — |
| +44 155010 | Protected | — |
| +44 155011 | Protected | — |
| +44 155012 | Protected | — |
| +44 155013 | Protected | — |
| +44 155014 | Protected | — |
| +44 155015 | Protected | — |
| +44 155016 | Protected | — |
| +44 155017 | Protected | — |
| +44 155018 | Protected | — |
| +44 155019 | Protected | — |
| +44 155020 | Allocated | Voiceflex Limited |
| +44 155021 | Allocated | Nationwide Telephone Assistance Ltd |
| +44 155022 | Protected | — |
| +44 1550230 | Protected | — |
| +44 1550231 | Protected | — |
| +44 1550232 | Protected | — |
| +44 1550233 | Protected | — |
| +44 1550234 | Protected | — |
| +44 1550235 | Protected | — |
| +44 1550236 | Protected | — |
| +44 1550237 | Allocated | Digital Space Group Limited |
| +44 1550238 | Protected | — |
| +44 1550239 | Protected | — |
| +44 155024 | Allocated | Telecom2 Limited |
| +44 155025 | Allocated | Digital Space Group Limited |
| +44 155026 | Allocated | Nodemax Limited |
| +44 155027 | Protected | — |
| +44 1550280 | Allocated | Voxbone SA |
| +44 1550281 | Protected | — |
| +44 1550282 | Protected | — |
| +44 1550283 | Protected | — |
| +44 1550284 | Protected | — |
| +44 1550285 | Protected | — |
| +44 1550286 | Protected | — |
| +44 1550287 | Protected | — |
| +44 1550288 | Protected | — |
| +44 1550289 | Protected | — |
| +44 155029 | Protected | — |
| +44 1550300 | Protected | — |
| +44 1550301 | Protected | — |
| +44 1550302 | Protected | — |
| +44 1550303 | Protected | — |
| +44 1550304 | Protected | — |
| +44 1550305 | Protected | — |
| +44 1550306 | Protected | — |
| +44 1550307 | Protected | — |
| +44 1550308 | Protected | — |
| +44 1550309 | Protected | — |
| +44 1550310 | Protected | — |
| +44 1550311 | Protected | — |
| +44 1550312 | Protected | — |
| +44 1550313 | Protected | — |
| +44 1550314 | Protected | — |
| +44 1550315 | Protected | — |
| +44 1550316 | Protected | — |
| +44 1550317 | Protected | — |
| +44 1550318 | Protected | — |
| +44 1550319 | Protected | — |
| +44 155032 | Allocated | TTNC Limited |
| +44 155033 | Allocated | Served Up Limited |
| +44 1550340 | Protected | — |
| +44 1550341 | Protected | — |
| +44 1550342 | Protected | — |
| +44 1550343 | Protected | — |
| +44 1550344 | Protected | — |
| +44 1550345 | Protected | — |
| +44 1550346 | Protected | — |
| +44 1550347 | Protected | — |
| +44 1550348 | Protected | — |
| +44 1550349 | Protected | — |
| +44 155035 | Protected | — |
| +44 155036 | Allocated | Barritel Limited |
| +44 1550370 | Protected | — |
| +44 1550371 | Protected | — |
| +44 1550372 | Protected | — |
| +44 1550373 | Protected | — |
| +44 1550374 | Protected | — |
| +44 1550375 | Protected | — |
| +44 1550376 | Protected | — |
| +44 1550377 | Allocated | Spitfire Network Services Limited |
| +44 1550378 | Protected | — |
| +44 1550379 | Protected | — |
| +44 155038 | Allocated | TelNG Limited |
| +44 155039 | Allocated | Localphone Limited |
| +44 155040 | Allocated | (AQ) LIMITED |
| +44 155041 | Allocated | VoIP-Un Limited |
| +44 155042 | Allocated | AQL Wholesale Ltd |
| +44 155043 | Allocated | Solutios Limited |
| +44 155044 | Allocated | Net-Work Internet Ltd |
| +44 155045 | Allocated | Mars Communications Limited |
| +44 155046 | Quarantined | — |
| +44 155047 | Allocated | Andrews & Arnold (Numbers) Ltd |
| +44 155048 | Allocated | Invade International Ltd |
| +44 155049 | Allocated | Nexus Telecommunications Limited |
| +44 155050 | Quarantined | — |
| +44 155051 | Allocated | CFL Communications Ltd |
| +44 155052 | Protected | — |
| +44 1550530 | Allocated | Digitech Solutions Global Limited |
| +44 1550531 | Allocated | Calltracks Limited |
| +44 1550532 | Allocated | Windsor Telecom Limited |
| +44 1550533 | Allocated | Atomstream Limited |
| +44 1550534 | Allocated | Telappliant Limited |
| +44 1550535 | Allocated | Suretec Systems Ltd |
| +44 1550536 | Allocated | Simwood eSMS Limited |
| +44 1550537 | Allocated | Inet Telecoms Ltd (Voipfone) |
| +44 1550538 | Allocated | GCI Network Solutions Limited |
| +44 1550539 | Allocated | Telephone Box Limited |
| +44 155054 | Protected | — |
| +44 1550550 | Protected | — |
| +44 1550551 | Allocated | INTELLIGENT EXCHANGES LIMITED |
| +44 1550552 | Allocated | Nexbridge Communications Limited |
| +44 1550553 | Allocated | Convergence Group (wireless) Networks Limited |
| +44 1550554 | Allocated | Invoco Ltd |
| +44 1550555 | Protected | — |
| +44 1550556 | Allocated | YayYay Limited |
| +44 1550557 | Protected | — |
| +44 1550558 | Allocated | Hello Telecom (UK) Limited |
| +44 1550559 | Allocated | Internexus Networks Limited |
| +44 1550560 | Allocated | Phone Co-Op Numbering Limited |
| +44 1550561 | Allocated | Invosys Limited |
| +44 1550562 | Protected | — |
| +44 1550563 | Allocated | Orbtalk Limited |
| +44 1550564 | Allocated | 8x8 Communications UK Limited |
| +44 1550565 | Allocated | ICC Networks Ltd |
| +44 1550566 | Protected | — |
| +44 1550567 | Allocated | IOVOX Limited |
| +44 1550568 | Allocated | Ziron Limited |
| +44 1550569 | Protected | — |
| +44 1550570 | Allocated | Nuso Cloud UK Limited |
| +44 1550571 | Allocated | Redwood Technologies Ltd |
| +44 1550572 | Allocated | Kalnet4U Ltd |
| +44 1550573 | Allocated | Fuse 2 Communications Ltd |
| +44 1550574 | Allocated | Alnitak GmbH |
| +44 1550575 | Allocated | Minotaur Telecom Limited |
| +44 1550576 | Protected | — |
| +44 1550577 | Allocated | Content Guru Limited |
| +44 1550578 | Allocated | IP Voice Networks Ltd |
| +44 1550579 | Allocated | XoverX Ltd |
| +44 1550580 | Allocated | I.T Communications Limited |
| +44 1550581 | Allocated | Adepteo Limited |
| +44 1550582 | Allocated | Zapappi Ltd |
| +44 1550583 | Allocated | Sky UK Limited |
| +44 1550584 | Allocated | EVE CONNECT LTD |
| +44 1550585 | Allocated | Colt Technology Services |
| +44 1550586 | Allocated | Fuse 2 Communications Ltd |
| +44 1550587 | Allocated | 24 Seven Cloud Communications Ltd |
| +44 1550588 | Protected | — |
| +44 1550589 | Allocated | Number Services Ltd. |
| +44 1550590 | Protected | — |
| +44 1550591 | Protected | — |
| +44 1550592 | Protected | — |
| +44 1550593 | Protected | — |
| +44 1550594 | Protected | — |
| +44 1550595 | Protected | — |
| +44 1550596 | Protected | — |
| +44 1550597 | Protected | — |
| +44 1550598 | Protected | — |
| +44 1550599 | Protected | — |
| +44 1550600 | Protected | — |
| +44 1550601 | Protected | — |
| +44 1550602 | Protected | — |
| +44 1550603 | Protected | — |
| +44 1550604 | Protected | — |
| +44 1550605 | Protected | — |
| +44 1550606 | Protected | — |
| +44 1550607 | Protected | — |
| +44 1550608 | Protected | — |
| +44 1550609 | Protected | — |
| +44 1550610 | Protected | — |
| +44 1550611 | Protected | — |
| +44 1550612 | Protected | — |
| +44 1550613 | Protected | — |
| +44 1550614 | Protected | — |
| +44 1550615 | Protected | — |
| +44 1550616 | Protected | — |
| +44 1550617 | Protected | — |
| +44 1550618 | Protected | — |
| +44 1550619 | Protected | — |
| +44 1550620 | Protected | — |
| +44 1550621 | Protected | — |
| +44 1550622 | Protected | — |
| +44 1550623 | Protected | — |
| +44 1550624 | Protected | — |
| +44 1550625 | Protected | — |
| +44 1550626 | Protected | — |
| +44 1550627 | Protected | — |
| +44 1550628 | Protected | — |
| +44 1550629 | Protected | — |
| +44 1550630 | Protected | — |
| +44 1550631 | Protected | — |
Related lookups
- 01591 Llanwrtyd Wells16 km away
- 01558 Llandeilo18 km away
- 01570 Lampeter23 km away
- 01269 Ammanford26 km away
- Gamma Telecom Holdings Limited8 allocated blocks on 01550
- BT5 allocated blocks on 01550
- Digital Space Group Limited2 allocated blocks on 01550
- All UK towns A–ZDialling codes by town
- More Wales 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 01550
Where is area code 01550?
01550 is Ofcom's Llandovery numbering area, in Carmarthenshire, Wales. Its exchange town is in Carmarthenshire. From abroad, drop the 0 and dial +44 1550.
Do I need to dial 01550 for a local call?
Traditionally not from another 01550 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01550 first always works, and mobiles always need it.
How are 01550 numbers written?
Numbers on 01550 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01550 234 567. From abroad the leading zero is dropped: +44 1550 then the local number.
What was the 01550 area code before?
01550 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 0550. Old signage or stationery showing 0550 refers to the same Llandovery numbers.
Which phone companies hold 01550 numbers?
Ofcom lists 81 providers with allocated blocks on 01550. The largest are Gamma Telecom Holdings Limited with 8 of the 96 allocated blocks, BT with 5 of the 96 allocated blocks and Digital Space Group Limited with 2 of the 96 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 01550?
By distance between exchange towns, the nearest other codes are 01591 Llanwrtyd Wells (16 km), 01558 Llandeilo (18 km), 01570 Lampeter (23 km) and 01269 Ammanford (26 km).
How do I report a scam call from a 01550 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.