UK area code
01438 area code — Stevenage
01438 is Ofcom’s Stevenage numbering area, in Hertfordshire, East of England England. 106 phone companies hold its 177 allocated number blocks. Its numbers are written like 01438 234 567. The nearest other codes are 01462 Hitchin (7 km) and 01707 Welwyn Garden City (12 km).
01438 at a glance
- Ofcom area name
- Stevenage
- County
- Hertfordshire
- Council area
- Hertfordshire
- Region
- East of England England
- Number format
- 01438 234 567 (4+6)
- Local calls
- Full number recommended
- Current code since
- 1995 (previously 0438)
- Allocated blocks
- 177 of 424 (42%) across 106 providers
- Newest block
- 17 March 2026 (3 in the last 12 months)
Sources: Ofcom numbering data (weekly) and area-code list, Ofcom Numbering Plan, ONS geography.
If a 01438 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.
01438 history and number format
Number format: Numbers on 01438 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01438 234 567.
Before 1995: 01438 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 0438.
Local dialling: Traditionally not from another 01438 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01438 first always works, and mobiles always need it.
Allocation record: the oldest number block still visible on 01438 was allocated on 15 July 1994, and the most recent on 17 March 2026. 3 blocks were allocated in the last 12 months — newly-activated ranges with no call history, which is worth knowing when an unfamiliar 01438 number rings (see the weekly numbering changelog for every new allocation.)
Phone companies holding 01438 numbers
Every Ofcom range holder with blocks on 01438, 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 | 2 October 2023 |
| Vodafone Ltd (C&W) | 11 | 11 | 2 September 2013 | 1 April 2019 |
| Sky UK Limited | 10 | 10 | 20 June 2013 | 15 May 2025 |
| Gamma Telecom Holdings Limited | 6 | 6 | 16 February 2005 | 28 August 2025 |
| TalkTalk Communications Limited | 5 | 5 | 19 January 2012 | 24 April 2015 |
| Colt Technology Services | 4 | 4 | 20 October 2011 | 3 July 2025 |
| Virgin Media Limited | 4 | 4 | 15 July 1994 | 13 June 1996 |
| Digital Space Group Limited | 3 | 3 | 30 November 2007 | 12 April 2016 |
| GCI Network Solutions Limited | 3 | 3 | 25 April 2017 | 20 December 2023 |
| Lumen Technologies UK Limited | 3 | 3 | 9 September 1999 | 9 September 1999 |
| Resilient Limited | 3 | 3 | 18 May 2012 | 18 May 2012 |
| Digitech Solutions Global Limited | 2 | 2 | 28 April 2010 | 26 June 2012 |
| Fuse 2 Communications Ltd | 2 | 2 | 3 July 2017 | 22 January 2024 |
| Orange Business Holdings UK Limited | 2 | 2 | 19 July 2012 | 16 January 2013 |
| Six Degrees Technology Group Limited | 2 | 2 | 14 January 2020 | 14 January 2020 |
| TELNYX UK LIMITED | 2 | 2 | 7 May 2020 | 23 July 2024 |
| Voxbone SA | 2 | 2 | 18 January 2008 | 18 January 2023 |
| (AQ) LIMITED | 1 | 1 | 11 September 2012 | 11 September 2012 |
| 24 Seven Cloud Communications Ltd | 1 | 1 | 30 September 2019 | 30 September 2019 |
| 8x8 Communications UK Limited | 1 | 1 | 29 March 2012 | 29 March 2012 |
| AQL Wholesale Ltd | 1 | 1 | 1 November 2004 | 1 November 2004 |
| Adepteo Limited | 1 | 1 | 17 January 2017 | 17 January 2017 |
| Alnitak GmbH | 1 | 1 | 26 October 2016 | 26 October 2016 |
| Andrews & Arnold (Numbers) Ltd | 1 | 1 | 6 March 2009 | 6 March 2009 |
| Atomstream Limited | 1 | 1 | 22 March 2010 | 22 March 2010 |
| Barritel Limited | 1 | 1 | 7 June 2007 | 7 June 2007 |
| Belgacom International Carrier Services SA | 1 | 1 | 23 April 2020 | 23 April 2020 |
| Bicom Systems EURL | 1 | 1 | 2 March 2012 | 2 March 2012 |
| Bink Networks Ltd | 1 | 1 | 11 April 2023 | 11 April 2023 |
| CFL Communications Ltd | 1 | 1 | 10 July 2009 | 10 July 2009 |
Showing the 30 largest of 106 holders.
Openreach exchanges at Stevenage
Exchanges Openreach lists at this location in its copper stop-sell programme, with the date new copper orders stop.
- Benington (QQX) SMBENStop sell 14-Feb-26 · Tranche 19
All number blocks on 01438first 200 of 424, by prefix
| Prefix | Status | Range holder |
|---|---|---|
| +44 143800 | Protected | — |
| +44 143801 | Protected | — |
| +44 143802 | Protected | — |
| +44 143803 | Protected | — |
| +44 143804 | Protected | — |
| +44 143805 | Protected | — |
| +44 143806 | Protected | — |
| +44 143807 | Protected | — |
| +44 143808 | Protected | — |
| +44 143809 | Protected | — |
| +44 143810 | Protected | — |
| +44 143811 | Protected | — |
| +44 143812 | Protected | — |
| +44 143813 | Protected | — |
| +44 143814 | Protected | — |
| +44 143815 | Protected | — |
| +44 143816 | Allocated | BT |
| +44 143817 | Protected | — |
| +44 143818 | Protected | — |
| +44 143819 | Protected | — |
| +44 143820 | Allocated | BT |
| +44 143821 | Allocated | Virgin Media Limited |
| +44 143822 | Allocated | Virgin Media Limited |
| +44 143823 | Allocated | Virgin Media Limited |
| +44 143824 | Allocated | Virgin Media Limited |
| +44 143825 | Allocated | Redcentric Solutions Limited |
| +44 1438260 | Allocated | Vodafone Ltd (C&W) |
| +44 1438261 | Allocated | Vodafone Ltd (C&W) |
| +44 1438262 | Allocated | Vodafone Ltd (C&W) |
| +44 1438263 | Allocated | Vodafone Ltd (C&W) |
| +44 1438264 | Allocated | Vodafone Ltd (C&W) |
| +44 1438265 | Allocated | Vodafone Ltd (C&W) |
| +44 1438266 | Allocated | Vodafone Ltd (C&W) |
| +44 1438267 | Protected | — |
| +44 1438268 | Protected | — |
| +44 1438269 | Protected | — |
| +44 143827 | Protected | — |
| +44 143828 | Allocated | Vodafone Ltd (C&W) |
| +44 1438290 | Protected | — |
| +44 1438291 | Allocated | DRD Communications Limited |
| +44 1438292 | Protected | — |
| +44 1438293 | Protected | — |
| +44 1438294 | Protected | — |
| +44 1438295 | Protected | — |
| +44 1438296 | Protected | — |
| +44 1438297 | Protected | — |
| +44 1438298 | Protected | — |
| +44 1438299 | Protected | — |
| +44 143830 | Allocated | AQL Wholesale Ltd |
| +44 143831 | Allocated | BT |
| +44 143832 | Allocated | TGL Services (UK) Ltd |
| +44 1438330 | Allocated | Lumen Technologies UK Limited |
| +44 1438331 | Protected | — |
| +44 1438332 | Protected | — |
| +44 1438333 | Allocated | Lumen Technologies UK Limited |
| +44 1438334 | Protected | — |
| +44 1438335 | Protected | — |
| +44 1438336 | Protected | — |
| +44 1438337 | Protected | — |
| +44 1438338 | Protected | — |
| +44 1438339 | Allocated | Lumen Technologies UK Limited |
| +44 143834 | Allocated | BT |
| +44 143835 | Allocated | BT |
| +44 143836 | Allocated | BT |
| +44 143837 | Allocated | Vodafone Ltd (C&W) |
| +44 1438380 | Allocated | Phone Co-Op Numbering Limited |
| +44 1438381 | Protected | — |
| +44 1438382 | Allocated | Invosys Limited |
| +44 1438383 | Allocated | INTELLIGENT EXCHANGES LIMITED |
| +44 1438384 | Allocated | 24 Seven Cloud Communications Ltd |
| +44 1438385 | Allocated | Nexbridge Communications Limited |
| +44 1438386 | Protected | — |
| +44 1438387 | Allocated | HAVENSTOKE COMMUNICATIONS LTD |
| +44 1438388 | Protected | — |
| +44 1438389 | Allocated | Orbtalk Limited |
| +44 143839 | Allocated | Voicetec Systems Ltd |
| +44 143840 | Protected | — |
| +44 1438410 | Allocated | Digitech Solutions Global Limited |
| +44 1438411 | Allocated | ICC Networks Ltd |
| +44 1438412 | Allocated | IOVOX Limited |
| +44 1438413 | Allocated | Orange Business Holdings UK Limited |
| +44 1438414 | Allocated | Fuse 2 Communications Ltd |
| +44 1438415 | Allocated | GCI Network Solutions Limited |
| +44 1438416 | Allocated | Sky UK Limited |
| +44 1438417 | Protected | — |
| +44 1438418 | Allocated | Redwood Technologies Ltd |
| +44 1438419 | Allocated | Vonage Business Limited |
| +44 143842 | Allocated | TTNC Limited |
| +44 1438430 | Protected | — |
| +44 1438431 | Protected | — |
| +44 1438432 | Protected | — |
| +44 1438433 | Protected | — |
| +44 1438434 | Protected | — |
| +44 1438435 | Protected | — |
| +44 1438436 | Protected | — |
| +44 1438437 | Protected | — |
| +44 1438438 | Protected | — |
| +44 1438439 | Protected | — |
| +44 143844 | Allocated | Served Up Limited |
| +44 1438450 | Protected | — |
| +44 1438451 | Protected | — |
| +44 1438452 | Protected | — |
| +44 1438453 | Allocated | Digital Space Group Limited |
| +44 1438454 | Protected | — |
| +44 1438455 | Protected | — |
| +44 1438456 | Protected | — |
| +44 1438457 | Protected | — |
| +44 1438458 | Protected | — |
| +44 1438459 | Protected | — |
| +44 1438460 | Protected | — |
| +44 1438461 | Protected | — |
| +44 1438462 | Protected | — |
| +44 1438463 | Protected | — |
| +44 1438464 | Protected | — |
| +44 1438465 | Protected | — |
| +44 1438466 | Protected | — |
| +44 1438467 | Protected | — |
| +44 1438468 | Protected | — |
| +44 1438469 | Protected | — |
| +44 1438470 | Protected | — |
| +44 1438471 | Protected | — |
| +44 1438472 | Protected | — |
| +44 1438473 | Protected | — |
| +44 1438474 | Protected | — |
| +44 1438475 | Protected | — |
| +44 1438476 | Protected | — |
| +44 1438477 | Allocated | Spitfire Network Services Limited |
| +44 1438478 | Protected | — |
| +44 1438479 | Protected | — |
| +44 1438480 | Protected | — |
| +44 1438481 | Protected | — |
| +44 1438482 | Protected | — |
| +44 1438483 | Protected | — |
| +44 1438484 | Protected | — |
| +44 1438485 | Protected | — |
| +44 1438486 | Protected | — |
| +44 1438487 | Allocated | TalkTalk Communications Limited |
| +44 1438488 | Allocated | TalkTalk Communications Limited |
| +44 1438489 | Allocated | TalkTalk Communications Limited |
| +44 1438490 | Allocated | Resilient Limited |
| +44 1438491 | Allocated | Resilient Limited |
| +44 1438492 | Protected | — |
| +44 1438493 | Protected | — |
| +44 1438494 | Protected | — |
| +44 1438495 | Protected | — |
| +44 1438496 | Protected | — |
| +44 1438497 | Protected | — |
| +44 1438498 | Protected | — |
| +44 1438499 | Allocated | Resilient Limited |
| +44 1438500 | Allocated | Voxbone SA |
| +44 1438501 | Allocated | TelXL Limited |
| +44 1438502 | Allocated | Telecom2 Limited |
| +44 1438503 | Allocated | Nodemax Limited |
| +44 1438504 | Allocated | TalkTalk Communications Limited |
| +44 1438505 | Allocated | Net-Work Internet Ltd |
| +44 1438506 | Allocated | Pulsant (Scotland) Limited |
| +44 1438507 | Protected | — |
| +44 1438508 | Allocated | Solutios Limited |
| +44 1438509 | Protected | — |
| +44 1438510 | Allocated | TalkTalk Communications Limited |
| +44 1438511 | Quarantined | — |
| +44 1438512 | Allocated | Mars Communications Limited |
| +44 1438513 | Allocated | TeleWare Group Limited |
| +44 1438514 | Allocated | Andrews & Arnold (Numbers) Ltd |
| +44 1438515 | Allocated | Sky UK Limited |
| +44 1438516 | Allocated | Telecoms World Limited |
| +44 1438517 | Allocated | Sky UK Limited |
| +44 1438518 | Allocated | GCI Network Solutions Limited |
| +44 1438519 | Allocated | Invade International Ltd |
| +44 1438520 | Allocated | CFL Communications Ltd |
| +44 1438521 | Allocated | Nexus Telecommunications Limited |
| +44 1438522 | Quarantined | — |
| +44 1438523 | Protected | — |
| +44 1438524 | Allocated | M247 Ltd |
| +44 1438525 | Allocated | Inet Telecoms Ltd (Voipfone) |
| +44 1438526 | Protected | — |
| +44 1438527 | Allocated | Atomstream Limited |
| +44 1438528 | Allocated | Digitech Solutions Global Limited |
| +44 1438529 | Allocated | Calltracks Limited |
| +44 1438530 | Allocated | Windsor Telecom Limited |
| +44 1438531 | Allocated | Core Telecom Limited |
| +44 1438532 | Allocated | Simwood eSMS Limited |
| +44 1438533 | Allocated | Suretec Systems Ltd |
| +44 1438534 | Allocated | Telappliant Limited |
| +44 1438535 | Allocated | VoiceHost Limited |
| +44 1438536 | Allocated | Telephone Box Limited |
| +44 1438537 | Allocated | Nuso Cloud UK Limited |
| +44 1438538 | Protected | — |
| +44 1438539 | Allocated | Datazero Ltd |
| +44 1438540 | Allocated | Invoco Ltd |
| +44 1438541 | Protected | — |
| +44 1438542 | Allocated | Hello Telecom (UK) Limited |
| +44 1438543 | Allocated | Internexus Networks Limited |
| +44 1438544 | Allocated | Colt Technology Services |
| +44 1438545 | Allocated | Sky UK Limited |
| +44 1438546 | Allocated | 8x8 Communications UK Limited |
| +44 1438547 | Allocated | Ziron Limited |
| +44 1438548 | Protected | — |
| +44 1438549 | Allocated | Bicom Systems EURL |
| +44 1438550 | Allocated | Sky UK Limited |
Related lookups
- 01462 Hitchin7 km away
- 01707 Welwyn Garden City12 km away
- 01920 Ware15 km away
- 01727 St Albans19 km away
- BT24 allocated blocks on 01438
- Vodafone Ltd (C&W)11 allocated blocks on 01438
- Sky UK Limited10 allocated blocks on 01438
- All UK towns A–ZDialling codes by town
- More Hertfordshire 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 01438
Where is area code 01438?
01438 is Ofcom's Stevenage numbering area, in Hertfordshire, East of England England. Its exchange town is in Hertfordshire. From abroad, drop the 0 and dial +44 1438.
Do I need to dial 01438 for a local call?
Traditionally not from another 01438 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01438 first always works, and mobiles always need it.
How are 01438 numbers written?
Numbers on 01438 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01438 234 567. From abroad the leading zero is dropped: +44 1438 then the local number.
What was the 01438 area code before?
01438 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 0438. Old signage or stationery showing 0438 refers to the same Stevenage numbers.
Which phone companies hold 01438 numbers?
Ofcom lists 106 providers with allocated blocks on 01438. The largest are BT with 24 of the 177 allocated blocks, Vodafone with 11 of the 177 allocated blocks and Sky UK Limited with 10 of the 177 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 01438?
By distance between exchange towns, the nearest other codes are 01462 Hitchin (7 km), 01707 Welwyn Garden City (12 km), 01920 Ware (15 km) and 01727 St Albans (19 km).
How do I report a scam call from a 01438 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.