UK area code
01727 area code — St Albans
01727 is Ofcom’s St Albans numbering area, in Hertfordshire, East of England England. 109 phone companies hold its 203 allocated number blocks. Its numbers are written like 01727 234 567. The nearest other codes are 01442 Hemel Hempstead (10 km) and 01707 Welwyn Garden City (10 km).
01727 at a glance
- Ofcom area name
- St Albans
- County
- Hertfordshire
- Council area
- Hertfordshire
- Region
- East of England England
- Number format
- 01727 234 567 (4+6)
- Local calls
- Full number recommended
- Current code since
- 1995 (previously 0727)
- Allocated blocks
- 203 of 505 (40%) across 109 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 01727 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.
01727 history and number format
Number format: Numbers on 01727 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01727 234 567.
Before 1995: 01727 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 0727.
Local dialling: Traditionally not from another 01727 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01727 first always works, and mobiles always need it.
Allocation record: the oldest number block still visible on 01727 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 01727 number rings (see the weekly numbering changelog for every new allocation.)
Phone companies holding 01727 numbers
Every Ofcom range holder with blocks on 01727, 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 |
|---|---|---|---|---|
| Virgin Media Limited | 20 | 20 | 15 July 1994 | 29 June 2012 |
| BT | 19 | 19 | 15 July 1994 | 10 November 2023 |
| Vodafone Ltd (C&W) | 16 | 16 | 10 September 2013 | 16 November 2021 |
| GCI Network Solutions Limited | 11 | 11 | 26 April 2017 | 26 February 2024 |
| Sky UK Limited | 8 | 8 | 21 June 2013 | 12 March 2021 |
| Gamma Telecom Holdings Limited | 6 | 6 | 20 April 2004 | 17 February 2022 |
| Colt Technology Services | 5 | 5 | 30 January 2013 | 11 December 2023 |
| GTT-EMEA LTD | 4 | 4 | 13 October 2021 | 13 October 2021 |
| TalkTalk Communications Limited | 4 | 4 | 19 January 2012 | 14 February 2013 |
| Digital Space Group Limited | 3 | 3 | 20 May 2008 | 12 April 2016 |
| AQL Wholesale Ltd | 2 | 2 | 1 November 2004 | 4 August 2006 |
| Calltracks Limited | 2 | 2 | 23 September 2013 | 2 October 2018 |
| DRD Communications Limited | 2 | 2 | 5 October 2023 | 5 October 2023 |
| Datazero Ltd | 2 | 2 | 4 November 2010 | 17 May 2019 |
| Digitech Solutions Global Limited | 2 | 2 | 27 April 2010 | 26 June 2012 |
| Fuse 2 Communications Ltd | 2 | 2 | 3 July 2017 | 22 January 2024 |
| Resilient Limited | 2 | 2 | 18 May 2012 | 18 May 2012 |
| Six Degrees Technology Group Limited | 2 | 2 | 14 January 2020 | 14 January 2020 |
| (AQ) LIMITED | 1 | 1 | 12 September 2012 | 12 September 2012 |
| 24 Seven Cloud Communications Ltd | 1 | 1 | 30 September 2019 | 30 September 2019 |
| 8x8 Communications UK Limited | 1 | 1 | 10 April 2012 | 10 April 2012 |
| 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 | 24 April 2020 | 24 April 2020 |
| Bicom Systems EURL | 1 | 1 | 1 March 2012 | 1 March 2012 |
| Buzz Networks Limited | 1 | 1 | 1 March 2010 | 1 March 2010 |
| CFL Communications Ltd | 1 | 1 | 21 July 2009 | 21 July 2009 |
| Ccpro Solutions Limited | 1 | 1 | 19 February 2013 | 19 February 2013 |
Showing the 30 largest of 109 holders.
Openreach exchanges at St Albans
Exchanges Openreach lists at this location in its copper stop-sell programme, with the date new copper orders stop.
- Bowmans Green LNBGNStop sell 01-Nov-22 · Tranche 6
All number blocks on 01727first 200 of 505, by prefix
| Prefix | Status | Range holder |
|---|---|---|
| +44 172700 | Protected | — |
| +44 172701 | Protected | — |
| +44 172702 | Protected | — |
| +44 172703 | Protected | — |
| +44 172704 | Protected | — |
| +44 172705 | Protected | — |
| +44 172706 | Protected | — |
| +44 172707 | Protected | — |
| +44 172708 | Protected | — |
| +44 172709 | Protected | — |
| +44 172710 | Protected | — |
| +44 172711 | Protected | — |
| +44 172712 | Protected | — |
| +44 172713 | Protected | — |
| +44 172714 | Protected | — |
| +44 172715 | Protected | — |
| +44 172716 | Protected | — |
| +44 172717 | Protected | — |
| +44 172718 | Protected | — |
| +44 172719 | Protected | — |
| +44 172720 | Allocated | Vodafone Ltd (C&W) |
| +44 1727210 | Protected | — |
| +44 1727211 | Protected | — |
| +44 1727212 | Allocated | GTT-EMEA LTD |
| +44 1727213 | Protected | — |
| +44 1727214 | Protected | — |
| +44 1727215 | Protected | — |
| +44 1727216 | Allocated | GTT-EMEA LTD |
| +44 1727217 | Allocated | GTT-EMEA LTD |
| +44 1727218 | Protected | — |
| +44 1727219 | Allocated | GTT-EMEA LTD |
| +44 172722 | Allocated | Gamma Telecom Holdings Limited |
| +44 172723 | Allocated | Magrathea Telecommunications Limited |
| +44 172724 | Allocated | GCI Network Solutions Limited |
| +44 1727250 | Allocated | DRD Communications Limited |
| +44 1727251 | Allocated | DRD Communications Limited |
| +44 1727252 | Protected | — |
| +44 1727253 | Protected | — |
| +44 1727254 | Protected | — |
| +44 1727255 | Protected | — |
| +44 1727256 | Protected | — |
| +44 1727257 | Protected | — |
| +44 1727258 | Protected | — |
| +44 1727259 | Protected | — |
| +44 172726 | Allocated | AQL Wholesale Ltd |
| +44 1727270 | Allocated | Vodafone Ltd (C&W) |
| +44 1727271 | Allocated | Vodafone Ltd (C&W) |
| +44 1727272 | Allocated | Vodafone Ltd (C&W) |
| +44 1727273 | Allocated | Vodafone Ltd (C&W) |
| +44 1727274 | Protected | — |
| +44 1727275 | Protected | — |
| +44 1727276 | Protected | — |
| +44 1727277 | Protected | — |
| +44 1727278 | Allocated | Vodafone Ltd (C&W) |
| +44 1727279 | Allocated | Vodafone Ltd (C&W) |
| +44 1727280 | Allocated | Vodafone Ltd (C&W) |
| +44 1727281 | Allocated | Vodafone Ltd (C&W) |
| +44 1727282 | Allocated | Vodafone Ltd (C&W) |
| +44 1727283 | Allocated | Vodafone Ltd (C&W) |
| +44 1727284 | Allocated | Vodafone Ltd (C&W) |
| +44 1727285 | Allocated | Vodafone Ltd (C&W) |
| +44 1727286 | Protected | — |
| +44 1727287 | Protected | — |
| +44 1727288 | Protected | — |
| +44 1727289 | Allocated | Vodafone Ltd (C&W) |
| +44 1727290 | Allocated | Linear Telecoms Limited |
| +44 1727291 | Allocated | Bicom Systems EURL |
| +44 1727292 | Allocated | 8x8 Communications UK Limited |
| +44 1727293 | Allocated | ICC Networks Ltd |
| +44 1727294 | Allocated | IOVOX Limited |
| +44 1727295 | Allocated | Ziron Limited |
| +44 1727296 | Allocated | Content Guru Limited |
| +44 1727297 | Allocated | Orange Business Holdings UK Limited |
| +44 1727298 | Allocated | Invoco Ltd |
| +44 1727299 | Protected | — |
| +44 1727300 | Protected | — |
| +44 1727301 | Allocated | Sky UK Limited |
| +44 1727302 | Allocated | Adepteo Limited |
| +44 1727303 | Free | — |
| +44 1727304 | Allocated | I.T Communications Limited |
| +44 1727305 | Allocated | NFON UK Ltd |
| +44 1727306 | Allocated | Entanet International Ltd |
| +44 1727307 | Allocated | Number Services Ltd. |
| +44 1727308 | Allocated | Zapappi Ltd |
| +44 1727309 | Allocated | IP Voice Networks Ltd |
| +44 172731 | Allocated | Invade International Ltd |
| +44 1727320 | Allocated | ICUK Computing Services Limited |
| +44 1727321 | Allocated | Sky UK Limited |
| +44 1727322 | Allocated | Colt Technology Services |
| +44 1727323 | Allocated | BT |
| +44 1727324 | Allocated | Colt Technology Services |
| +44 1727325 | Allocated | Lanonyx Telecom Limited |
| +44 1727326 | Allocated | Twilio Ireland Limited |
| +44 1727327 | Allocated | SiPalto Ltd |
| +44 1727328 | Allocated | Belgacom International Carrier Services SA |
| +44 1727329 | Free | — |
| +44 172733 | Allocated | Served Up Limited |
| +44 172734 | Protected | — |
| +44 172735 | Allocated | Flextel Limited |
| +44 172736 | Protected | — |
| +44 1727370 | Allocated | Virgin Media Limited |
| +44 1727371 | Protected | — |
| +44 1727372 | Protected | — |
| +44 1727373 | Allocated | Virgin Media Limited |
| +44 1727374 | Protected | — |
| +44 1727375 | Allocated | Virgin Media Limited |
| +44 1727376 | Allocated | Virgin Media Limited |
| +44 1727377 | Allocated | Virgin Media Limited |
| +44 1727378 | Allocated | Virgin Media Limited |
| +44 1727379 | Allocated | Virgin Media Limited |
| +44 1727380 | Allocated | Six Degrees Technology Group Limited |
| +44 1727381 | Protected | — |
| +44 1727382 | Protected | — |
| +44 1727383 | Protected | — |
| +44 1727384 | Allocated | Six Degrees Technology Group Limited |
| +44 1727385 | Protected | — |
| +44 1727386 | Protected | — |
| +44 1727387 | Protected | — |
| +44 1727388 | Protected | — |
| +44 1727389 | Protected | — |
| +44 1727390 | Protected | — |
| +44 1727391 | Protected | — |
| +44 1727392 | Protected | — |
| +44 1727393 | Protected | — |
| +44 1727394 | Protected | — |
| +44 1727395 | Protected | — |
| +44 1727396 | Protected | — |
| +44 1727397 | Protected | — |
| +44 1727398 | Protected | — |
| +44 1727399 | Protected | — |
| +44 172740 | Allocated | TTNC Limited |
| +44 1727410 | Allocated | Digitech Solutions Global Limited |
| +44 1727411 | Free | — |
| +44 1727412 | Free | — |
| +44 1727413 | Free | — |
| +44 1727414 | Protected | — |
| +44 1727415 | Protected | — |
| +44 1727416 | Protected | — |
| +44 1727417 | Protected | — |
| +44 1727418 | Protected | — |
| +44 1727419 | Protected | — |
| +44 1727420 | Allocated | Sky UK Limited |
| +44 1727421 | Allocated | Sky UK Limited |
| +44 1727422 | Allocated | Sky UK Limited |
| +44 1727423 | Protected | — |
| +44 1727424 | Protected | — |
| +44 1727425 | Protected | — |
| +44 1727426 | Protected | — |
| +44 1727427 | Protected | — |
| +44 1727428 | Protected | — |
| +44 1727429 | Protected | — |
| +44 172743 | Allocated | Barritel Limited |
| +44 172744 | Protected | — |
| +44 1727450 | Protected | — |
| +44 1727451 | Protected | — |
| +44 1727452 | Protected | — |
| +44 1727453 | Allocated | Digital Space Group Limited |
| +44 1727454 | Protected | — |
| +44 1727455 | Protected | — |
| +44 1727456 | Protected | — |
| +44 1727457 | Protected | — |
| +44 1727458 | Protected | — |
| +44 1727459 | Protected | — |
| +44 172746 | Allocated | AQL Wholesale Ltd |
| +44 1727470 | Protected | — |
| +44 1727471 | Protected | — |
| +44 1727472 | Protected | — |
| +44 1727473 | Protected | — |
| +44 1727474 | Protected | — |
| +44 1727475 | Protected | — |
| +44 1727476 | Protected | — |
| +44 1727477 | Allocated | Spitfire Network Services Limited |
| +44 1727478 | Protected | — |
| +44 1727479 | Protected | — |
| +44 172748 | Allocated | Simwood eSMS Limited |
| +44 1727490 | Protected | — |
| +44 1727491 | Protected | — |
| +44 1727492 | Protected | — |
| +44 1727493 | Protected | — |
| +44 1727494 | Protected | — |
| +44 1727495 | Protected | — |
| +44 1727496 | Protected | — |
| +44 1727497 | Protected | — |
| +44 1727498 | Protected | — |
| +44 1727499 | Protected | — |
| +44 172750 | Allocated | TelNG Limited |
| +44 1727510 | Allocated | Localphone Limited |
| +44 1727511 | Allocated | (AQ) LIMITED |
| +44 1727512 | Allocated | Redcentric Solutions Limited |
| +44 1727513 | Allocated | Digital Space Group Limited |
| +44 1727514 | Allocated | Nationwide Telephone Assistance Ltd |
| +44 1727515 | Allocated | VoIP-Un Limited |
| +44 1727516 | Allocated | Telecom2 Limited |
| +44 1727517 | Allocated | Nodemax Limited |
| +44 1727518 | Allocated | Digital Space Group Limited |
| +44 1727519 | Allocated | Voiceflex Limited |
| +44 172752 | Protected | — |
| +44 1727530 | Allocated | TalkTalk Communications Limited |
| +44 1727531 | Allocated | Pulsant (Scotland) Limited |
| +44 1727532 | Allocated | Voxbone SA |
Related lookups
- 01442 Hemel Hempstead10 km away
- 01707 Welwyn Garden City10 km away
- 01923 Watford12 km away
- 01438 Stevenage19 km away
- Virgin Media Limited20 allocated blocks on 01727
- BT19 allocated blocks on 01727
- Vodafone Ltd (C&W)16 allocated blocks on 01727
- 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 01727
Where is area code 01727?
01727 is Ofcom's St Albans numbering area, in Hertfordshire, East of England England. Its exchange town is in Hertfordshire. From abroad, drop the 0 and dial +44 1727.
Do I need to dial 01727 for a local call?
Traditionally not from another 01727 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01727 first always works, and mobiles always need it.
How are 01727 numbers written?
Numbers on 01727 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01727 234 567. From abroad the leading zero is dropped: +44 1727 then the local number.
What was the 01727 area code before?
01727 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 0727. Old signage or stationery showing 0727 refers to the same St Albans numbers.
Which phone companies hold 01727 numbers?
Ofcom lists 109 providers with allocated blocks on 01727. The largest are Virgin Media Limited with 20 of the 203 allocated blocks, BT with 19 of the 203 allocated blocks and Vodafone with 16 of the 203 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 01727?
By distance between exchange towns, the nearest other codes are 01442 Hemel Hempstead (10 km), 01707 Welwyn Garden City (10 km), 01923 Watford (12 km) and 01438 Stevenage (19 km).
How do I report a scam call from a 01727 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.