UK area code
01737 area code — Redhill
01737 is Ofcom’s Redhill numbering area, in Surrey, South East England. 101 phone companies hold its 210 allocated number blocks. Its numbers are written like 01737 234 567. The nearest other codes are 01883 Caterham (7 km) and 01306 Dorking (12 km).
01737 at a glance
- Ofcom area name
- Redhill
- County
- Surrey
- Council area
- Surrey
- Region
- South East England
- Number format
- 01737 234 567 (4+6)
- Local calls
- Full number recommended
- Current code since
- 1995 (previously 0737)
- Allocated blocks
- 210 of 433 (48%) across 101 providers
- Newest block
- 17 March 2026 (2 in the last 12 months)
Sources: Ofcom numbering data (weekly) and area-code list, Ofcom Numbering Plan, ONS geography.
If a 01737 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.
01737 history and number format
Number format: Numbers on 01737 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01737 234 567.
Before 1995: 01737 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 0737.
Local dialling: Traditionally not from another 01737 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01737 first always works, and mobiles always need it.
Allocation record: the oldest number block still visible on 01737 was allocated on 15 July 1994, and the most recent on 17 March 2026. 2 blocks were allocated in the last 12 months — newly-activated ranges with no call history, which is worth knowing when an unfamiliar 01737 number rings (see the weekly numbering changelog for every new allocation.)
Phone companies holding 01737 numbers
Every Ofcom range holder with blocks on 01737, 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 | 24 | 24 | 15 July 1994 | 16 October 2023 |
| Virgin Media Limited | 18 | 18 | 15 July 1994 | 27 June 2012 |
| Sky UK Limited | 12 | 12 | 21 June 2013 | 15 May 2025 |
| Vodafone Ltd (C&W) | 11 | 11 | 10 September 2013 | 16 November 2021 |
| Gamma Telecom Holdings Limited | 9 | 9 | 8 April 2005 | 17 March 2025 |
| GCI Network Solutions Limited | 8 | 8 | 26 April 2017 | 26 February 2024 |
| Colt Technology Services | 6 | 6 | 16 January 2009 | 23 February 2022 |
| GTT-EMEA LTD | 6 | 6 | 13 October 2021 | 13 October 2021 |
| Magrathea Telecommunications Limited | 6 | 6 | 18 November 2011 | 18 November 2011 |
| Lumen Technologies UK Limited | 5 | 5 | 26 July 2011 | 26 July 2011 |
| TalkTalk Communications Limited | 5 | 5 | 31 August 2011 | 2 May 2017 |
| Digital Space Group Limited | 3 | 3 | 20 May 2008 | 12 April 2016 |
| 24 Seven Cloud Communications Ltd | 2 | 2 | 30 September 2019 | 21 January 2020 |
| Fuse 2 Communications Ltd | 2 | 2 | 3 July 2017 | 22 January 2024 |
| Media Hawk Ltd | 2 | 2 | 10 April 2013 | 25 November 2015 |
| Resilient Limited | 2 | 2 | 12 September 2011 | 12 September 2011 |
| Served Up Limited | 2 | 2 | 1 March 2013 | 1 March 2013 |
| Six Degrees Technology Group Limited | 2 | 2 | 3 April 2020 | 3 April 2020 |
| Voiceflex Limited | 2 | 2 | 27 September 2007 | 11 July 2024 |
| Voxbone SA | 2 | 2 | 25 September 2008 | 17 March 2026 |
| (AQ) LIMITED | 1 | 1 | 12 September 2012 | 12 September 2012 |
| 8x8 Communications UK Limited | 1 | 1 | 10 April 2012 | 10 April 2012 |
| 8x8 UK Limited | 1 | 1 | 24 February 2010 | 24 February 2010 |
| AQL Wholesale Ltd | 1 | 1 | 4 August 2006 | 4 August 2006 |
| Adepteo Limited | 1 | 1 | 6 December 2016 | 6 December 2016 |
| Andrews & Arnold (Numbers) Ltd | 1 | 1 | 27 March 2009 | 27 March 2009 |
| Atomstream Limited | 1 | 1 | 29 March 2010 | 29 March 2010 |
| Barritel Limited | 1 | 1 | 23 June 2006 | 23 June 2006 |
| Belgacom International Carrier Services SA | 1 | 1 | 9 April 2020 | 9 April 2020 |
| Bicom Systems EURL | 1 | 1 | 1 March 2012 | 1 March 2012 |
Showing the 30 largest of 101 holders.
All number blocks on 01737first 200 of 433, by prefix
| Prefix | Status | Range holder |
|---|---|---|
| +44 173700 | Protected | — |
| +44 173701 | Protected | — |
| +44 173702 | Protected | — |
| +44 173703 | Protected | — |
| +44 173704 | Protected | — |
| +44 173705 | Protected | — |
| +44 173706 | Protected | — |
| +44 173707 | Protected | — |
| +44 173708 | Protected | — |
| +44 173709 | Protected | — |
| +44 173710 | Protected | — |
| +44 173711 | Protected | — |
| +44 173712 | Protected | — |
| +44 173713 | Protected | — |
| +44 173714 | Protected | — |
| +44 173715 | Protected | — |
| +44 173716 | Protected | — |
| +44 173717 | Protected | — |
| +44 173718 | Protected | — |
| +44 173719 | Allocated | BT |
| +44 1737200 | Allocated | Sky UK Limited |
| +44 1737201 | Allocated | Sky UK Limited |
| +44 1737202 | Allocated | Sky UK Limited |
| +44 1737203 | Protected | — |
| +44 1737204 | Protected | — |
| +44 1737205 | Protected | — |
| +44 1737206 | Protected | — |
| +44 1737207 | Protected | — |
| +44 1737208 | Protected | — |
| +44 1737209 | Protected | — |
| +44 173721 | Allocated | Virgin Media Limited |
| +44 173722 | Allocated | BT |
| +44 173723 | Allocated | BT |
| +44 173724 | Allocated | BT |
| +44 1737250 | Protected | — |
| +44 1737251 | Protected | — |
| +44 1737252 | Allocated | Virgin Media Limited |
| +44 1737253 | Protected | — |
| +44 1737254 | Allocated | Virgin Media Limited |
| +44 1737255 | Protected | — |
| +44 1737256 | Protected | — |
| +44 1737257 | Protected | — |
| +44 1737258 | Protected | — |
| +44 1737259 | Protected | — |
| +44 1737260 | Protected | — |
| +44 1737261 | Protected | — |
| +44 1737262 | Protected | — |
| +44 1737263 | Allocated | Digital Space Group Limited |
| +44 1737264 | Protected | — |
| +44 1737265 | Protected | — |
| +44 1737266 | Protected | — |
| +44 1737267 | Protected | — |
| +44 1737268 | Protected | — |
| +44 1737269 | Protected | — |
| +44 173727 | Allocated | Virgin Media Limited |
| +44 1737280 | Protected | — |
| +44 1737281 | Allocated | Virgin Media Limited |
| +44 1737282 | Protected | — |
| +44 1737283 | Allocated | Virgin Media Limited |
| +44 1737284 | Allocated | Virgin Media Limited |
| +44 1737285 | Protected | — |
| +44 1737286 | Protected | — |
| +44 1737287 | Allocated | Virgin Media Limited |
| +44 1737288 | Allocated | Virgin Media Limited |
| +44 1737289 | Allocated | Virgin Media Limited |
| +44 1737290 | Allocated | Virgin Media Limited |
| +44 1737291 | Allocated | Virgin Media Limited |
| +44 1737292 | Allocated | Virgin Media Limited |
| +44 1737293 | Allocated | Virgin Media Limited |
| +44 1737294 | Allocated | Virgin Media Limited |
| +44 1737295 | Allocated | Virgin Media Limited |
| +44 1737296 | Allocated | Virgin Media Limited |
| +44 1737297 | Allocated | Virgin Media Limited |
| +44 1737298 | Protected | — |
| +44 1737299 | Protected | — |
| +44 173730 | Allocated | Gamma Telecom Holdings Limited |
| +44 1737310 | Protected | — |
| +44 1737311 | Protected | — |
| +44 1737312 | Protected | — |
| +44 1737313 | Protected | — |
| +44 1737314 | Protected | — |
| +44 1737315 | Protected | — |
| +44 1737316 | Protected | — |
| +44 1737317 | Allocated | Spitfire Network Services Limited |
| +44 1737318 | Protected | — |
| +44 1737319 | Protected | — |
| +44 173732 | Allocated | Vodafone Ltd (C&W) |
| +44 173733 | Allocated | BT |
| +44 173734 | Allocated | Vodafone Ltd (C&W) |
| +44 173735 | Allocated | BT |
| +44 173736 | Allocated | BT |
| +44 173737 | Allocated | BT |
| +44 1737380 | Allocated | Vodafone Ltd (C&W) |
| +44 1737381 | Allocated | Vodafone Ltd (C&W) |
| +44 1737382 | Protected | — |
| +44 1737383 | Protected | — |
| +44 1737384 | Protected | — |
| +44 1737385 | Allocated | Vodafone Ltd (C&W) |
| +44 1737386 | Allocated | Vodafone Ltd (C&W) |
| +44 1737387 | Allocated | Vodafone Ltd (C&W) |
| +44 1737388 | Allocated | Vodafone Ltd (C&W) |
| +44 1737389 | Allocated | Vodafone Ltd (C&W) |
| +44 173739 | Allocated | GCI Network Solutions Limited |
| +44 173740 | Allocated | TTNC Limited |
| +44 173741 | Allocated | TelNG Limited |
| +44 1737420 | Allocated | Voiceflex Limited |
| +44 1737421 | Allocated | Digital Space Group Limited |
| +44 1737422 | Allocated | VoIP-Un Limited |
| +44 1737423 | Allocated | TalkTalk Communications Limited |
| +44 1737424 | Allocated | Digital Space Group Limited |
| +44 1737425 | Allocated | Solutios Limited |
| +44 1737426 | Protected | — |
| +44 1737427 | Allocated | Telecom2 Limited |
| +44 1737428 | Allocated | Voxbone SA |
| +44 1737429 | Quarantined | — |
| +44 173743 | Protected | — |
| +44 1737440 | Allocated | Localphone Limited |
| +44 1737441 | Allocated | Colt Technology Services |
| +44 1737442 | Allocated | Nexus Telecommunications Limited |
| +44 1737443 | Allocated | Gamma Telecom Holdings Limited |
| +44 1737444 | Allocated | (AQ) LIMITED |
| +44 1737445 | Allocated | TeleWare Group Limited |
| +44 1737446 | Allocated | Telecoms World Limited |
| +44 1737447 | Allocated | Net-Work Internet Ltd |
| +44 1737448 | Allocated | Buzz Networks Limited |
| +44 1737449 | Allocated | Suretec Systems Ltd |
| +44 1737450 | Allocated | Andrews & Arnold (Numbers) Ltd |
| +44 1737451 | Protected | — |
| +44 1737452 | Allocated | 8x8 UK Limited |
| +44 1737453 | Allocated | Atomstream Limited |
| +44 1737454 | Allocated | Nuso Cloud UK Limited |
| +44 1737455 | Allocated | Nodemax Limited |
| +44 1737456 | Protected | — |
| +44 1737457 | Allocated | Inet Telecoms Ltd (Voipfone) |
| +44 1737458 | Allocated | Calltracks Limited |
| +44 1737459 | Allocated | Core Telecom Limited |
| +44 1737460 | Quarantined | — |
| +44 1737461 | Protected | — |
| +44 1737462 | Allocated | Nexbridge Communications Limited |
| +44 1737463 | Allocated | Internexus Networks Limited |
| +44 1737464 | Allocated | Invosys Limited |
| +44 1737465 | Allocated | Minotaur Telecom Limited |
| +44 1737466 | Allocated | Mars Communications Limited |
| +44 1737467 | Allocated | Bicom Systems EURL |
| +44 1737468 | Protected | — |
| +44 1737469 | Allocated | 8x8 Communications UK Limited |
| +44 1737470 | Allocated | Windsor Telecom Limited |
| +44 1737471 | Allocated | Datazero Ltd |
| +44 1737472 | Allocated | Phone Co-Op Numbering Limited |
| +44 1737473 | Allocated | ICC Networks Ltd |
| +44 1737474 | Allocated | INTELLIGENT EXCHANGES LIMITED |
| +44 1737475 | Protected | — |
| +44 1737476 | Protected | — |
| +44 1737477 | Allocated | CFL Communications Ltd |
| +44 1737478 | Allocated | Hello Telecom (UK) Limited |
| +44 1737479 | Allocated | TalkTalk Communications Limited |
| +44 1737480 | Allocated | Telephone Box Limited |
| +44 1737481 | Allocated | Ziron Limited |
| +44 1737482 | Allocated | Content Guru Limited |
| +44 1737483 | Allocated | IOVOX Limited |
| +44 1737484 | Protected | — |
| +44 1737485 | Allocated | Sky UK Limited |
| +44 1737486 | Allocated | Invoco Ltd |
| +44 1737487 | Allocated | 24 Seven Cloud Communications Ltd |
| +44 1737488 | Allocated | Telappliant Limited |
| +44 1737489 | Allocated | Nationwide Telephone Assistance Ltd |
| +44 1737490 | Allocated | Resilient Limited |
| +44 1737491 | Protected | — |
| +44 1737492 | Protected | — |
| +44 1737493 | Protected | — |
| +44 1737494 | Protected | — |
| +44 1737495 | Protected | — |
| +44 1737496 | Protected | — |
| +44 1737497 | Protected | — |
| +44 1737498 | Protected | — |
| +44 1737499 | Allocated | Resilient Limited |
| +44 173750 | Allocated | Vodafone Ltd (C&W) |
| +44 1737510 | Allocated | Linear Telecoms Limited |
| +44 1737511 | Allocated | Sky UK Limited |
| +44 1737512 | Allocated | I.T Communications Limited |
| +44 1737513 | Allocated | Adepteo Limited |
| +44 1737514 | Allocated | Sky UK Limited |
| +44 1737515 | Protected | — |
| +44 1737516 | Allocated | TalkTalk Communications Limited |
| +44 1737517 | Allocated | Gamma Telecom Holdings Limited |
| +44 1737518 | Allocated | Fuse 2 Communications Ltd |
| +44 1737519 | Protected | — |
| +44 1737520 | Allocated | GTT-EMEA LTD |
| +44 1737521 | Protected | — |
| +44 1737522 | Protected | — |
| +44 1737523 | Allocated | GTT-EMEA LTD |
| +44 1737524 | Allocated | GTT-EMEA LTD |
| +44 1737525 | Allocated | GTT-EMEA LTD |
| +44 1737526 | Protected | — |
| +44 1737527 | Allocated | GTT-EMEA LTD |
| +44 1737528 | Protected | — |
| +44 1737529 | Allocated | GTT-EMEA LTD |
| +44 173753 | Allocated | Redcentric Solutions Limited |
| +44 173754 | Protected | — |
| +44 173755 | Allocated | BT |
Related lookups
- 01883 Caterham7 km away
- 01306 Dorking12 km away
- 01293 Crawley14 km away
- 01959 Westerham16 km away
- BT24 allocated blocks on 01737
- Virgin Media Limited18 allocated blocks on 01737
- Sky UK Limited12 allocated blocks on 01737
- All UK towns A–ZDialling codes by town
- More Surrey 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 01737
Where is area code 01737?
01737 is Ofcom's Redhill numbering area, in Surrey, South East England. Its exchange town is in Surrey. From abroad, drop the 0 and dial +44 1737.
Do I need to dial 01737 for a local call?
Traditionally not from another 01737 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01737 first always works, and mobiles always need it.
How are 01737 numbers written?
Numbers on 01737 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01737 234 567. From abroad the leading zero is dropped: +44 1737 then the local number.
What was the 01737 area code before?
01737 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 0737. Old signage or stationery showing 0737 refers to the same Redhill numbers.
Which phone companies hold 01737 numbers?
Ofcom lists 101 providers with allocated blocks on 01737. The largest are BT with 24 of the 210 allocated blocks, Virgin Media Limited with 18 of the 210 allocated blocks and Sky UK Limited with 12 of the 210 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 01737?
By distance between exchange towns, the nearest other codes are 01883 Caterham (7 km), 01306 Dorking (12 km), 01293 Crawley (14 km) and 01959 Westerham (16 km).
How do I report a scam call from a 01737 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.