UK area code
01842 area code — Thetford
01842 is Ofcom’s Thetford numbering area, in Norfolk, East of England England. 91 phone companies hold its 129 allocated number blocks. Its numbers are written like 01842 234 567. The nearest other codes are 01359 Pakenham (17 km) and 01284 Bury St Edmunds (20 km).
01842 at a glance
- Ofcom area name
- Thetford
- County
- Norfolk
- Council area
- Norfolk
- Region
- East of England England
- Number format
- 01842 234 567 (4+6)
- Local calls
- Full number recommended
- Current code since
- 1995 (previously 0842)
- Allocated blocks
- 129 of 397 (32%) across 91 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 01842 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.
01842 history and number format
Number format: Numbers on 01842 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01842 234 567.
Before 1995: 01842 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 0842.
Local dialling: Traditionally not from another 01842 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01842 first always works, and mobiles always need it.
Allocation record: the oldest number block still visible on 01842 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 01842 number rings (see the weekly numbering changelog for every new allocation.)
Phone companies holding 01842 numbers
Every Ofcom range holder with blocks on 01842, 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 |
|---|---|---|---|---|
| GCI Network Solutions Limited | 11 | 11 | 2 May 2017 | 26 February 2024 |
| BT | 10 | 10 | 15 July 1994 | 22 February 2023 |
| Sky UK Limited | 5 | 5 | 12 June 2013 | 30 August 2018 |
| TalkTalk Communications Limited | 5 | 5 | 20 January 2012 | 14 June 2019 |
| Vodafone Ltd (C&W) | 4 | 4 | 6 September 2013 | 16 November 2021 |
| GTT-EMEA LTD | 3 | 3 | 13 October 2021 | 13 October 2021 |
| Resilient Limited | 3 | 3 | 18 May 2012 | 18 May 2012 |
| Digital Space Group Limited | 2 | 2 | 23 May 2008 | 15 March 2016 |
| Fuse 2 Communications Ltd | 2 | 2 | 3 July 2017 | 22 January 2024 |
| Gamma Telecom Holdings Limited | 2 | 2 | 8 April 2005 | 17 September 2025 |
| Six Degrees Technology Group Limited | 2 | 2 | 14 January 2020 | 14 January 2020 |
| (AQ) LIMITED | 1 | 1 | 26 September 2012 | 26 September 2012 |
| 24 Seven Cloud Communications Ltd | 1 | 1 | 27 January 2020 | 27 January 2020 |
| 8x8 Communications UK Limited | 1 | 1 | 18 April 2012 | 18 April 2012 |
| AQL Wholesale Ltd | 1 | 1 | 1 November 2004 | 1 November 2004 |
| Adepteo Limited | 1 | 1 | 6 December 2016 | 6 December 2016 |
| Andrews & Arnold (Numbers) Ltd | 1 | 1 | 2 April 2009 | 2 April 2009 |
| Atomstream Limited | 1 | 1 | 14 May 2010 | 14 May 2010 |
| Barritel Limited | 1 | 1 | 2 October 2006 | 2 October 2006 |
| Belgacom International Carrier Services SA | 1 | 1 | 10 July 2020 | 10 July 2020 |
| Bicom Systems EURL | 1 | 1 | 1 March 2012 | 1 March 2012 |
| Bink Networks Ltd | 1 | 1 | 11 April 2023 | 11 April 2023 |
| CFL Communications Ltd | 1 | 1 | 17 July 2009 | 17 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 | 11 October 2012 | 11 October 2012 |
| Convergence Group (wireless) Networks Limited | 1 | 1 | 21 May 2019 | 21 May 2019 |
| Core Telecom Limited | 1 | 1 | 6 August 2010 | 6 August 2010 |
| DIDWW Ireland Limited | 1 | 1 | 27 January 2020 | 27 January 2020 |
| DRD Communications Limited | 1 | 1 | 5 October 2023 | 5 October 2023 |
Showing the 30 largest of 91 holders.
All number blocks on 01842first 200 of 397, by prefix
| Prefix | Status | Range holder |
|---|---|---|
| +44 184200 | Protected | — |
| +44 184201 | Protected | — |
| +44 184202 | Protected | — |
| +44 184203 | Protected | — |
| +44 184204 | Protected | — |
| +44 184205 | Protected | — |
| +44 184206 | Protected | — |
| +44 184207 | Protected | — |
| +44 184208 | Protected | — |
| +44 184209 | Protected | — |
| +44 184210 | Protected | — |
| +44 184211 | Protected | — |
| +44 184212 | Protected | — |
| +44 184213 | Protected | — |
| +44 184214 | Protected | — |
| +44 184215 | Protected | — |
| +44 184216 | Protected | — |
| +44 184217 | Protected | — |
| +44 184218 | Protected | — |
| +44 184219 | Protected | — |
| +44 184220 | Protected | — |
| +44 1842210 | Protected | — |
| +44 1842211 | Protected | — |
| +44 1842212 | Protected | — |
| +44 1842213 | Protected | — |
| +44 1842214 | Protected | — |
| +44 1842215 | Protected | — |
| +44 1842216 | Protected | — |
| +44 1842217 | Protected | — |
| +44 1842218 | Protected | — |
| +44 1842219 | Protected | — |
| +44 184222 | Allocated | Vodafone Ltd (C&W) |
| +44 184223 | Allocated | Barritel Limited |
| +44 184224 | Protected | — |
| +44 184225 | Allocated | TTNC Limited |
| +44 1842260 | Allocated | Digitech Solutions Global Limited |
| +44 1842261 | Allocated | Orbtalk Limited |
| +44 1842262 | Allocated | Minotaur Telecom Limited |
| +44 1842263 | Protected | — |
| +44 1842264 | Protected | — |
| +44 1842265 | Protected | — |
| +44 1842266 | Allocated | TalkTalk Communications Limited |
| +44 1842267 | Allocated | Inet Telecoms Ltd (Voipfone) |
| +44 1842268 | Allocated | Internexus Networks Limited |
| +44 1842269 | Allocated | Hello Telecom (UK) Limited |
| +44 1842270 | Protected | — |
| +44 1842271 | Protected | — |
| +44 1842272 | Protected | — |
| +44 1842273 | Protected | — |
| +44 1842274 | Protected | — |
| +44 1842275 | Protected | — |
| +44 1842276 | Protected | — |
| +44 1842277 | Allocated | Spitfire Network Services Limited |
| +44 1842278 | Protected | — |
| +44 1842279 | Protected | — |
| +44 1842280 | Protected | — |
| +44 1842281 | Protected | — |
| +44 1842282 | Allocated | Gamma Telecom Holdings Limited |
| +44 1842283 | Protected | — |
| +44 1842284 | Protected | — |
| +44 1842285 | Protected | — |
| +44 1842286 | Allocated | GTT-EMEA LTD |
| +44 1842287 | Allocated | GTT-EMEA LTD |
| +44 1842288 | Protected | — |
| +44 1842289 | Allocated | GTT-EMEA LTD |
| +44 1842290 | Protected | — |
| +44 1842291 | Protected | — |
| +44 1842292 | Protected | — |
| +44 1842293 | Protected | — |
| +44 1842294 | Protected | — |
| +44 1842295 | Protected | — |
| +44 1842296 | Protected | — |
| +44 1842297 | Protected | — |
| +44 1842298 | Protected | — |
| +44 1842299 | Protected | — |
| +44 184230 | Allocated | TelNG Limited |
| +44 184231 | Allocated | Voiceflex Limited |
| +44 184232 | Allocated | Localphone Limited |
| +44 1842330 | Protected | — |
| +44 1842331 | Protected | — |
| +44 1842332 | Protected | — |
| +44 1842333 | Protected | — |
| +44 1842334 | Protected | — |
| +44 1842335 | Protected | — |
| +44 1842336 | Protected | — |
| +44 1842337 | Allocated | TalkTalk Communications Limited |
| +44 1842338 | Allocated | TalkTalk Communications Limited |
| +44 1842339 | Allocated | TalkTalk Communications Limited |
| +44 184234 | Protected | — |
| +44 1842350 | Protected | — |
| +44 1842351 | Protected | — |
| +44 1842352 | Protected | — |
| +44 1842353 | Protected | — |
| +44 1842354 | Protected | — |
| +44 1842355 | Protected | — |
| +44 1842356 | Protected | — |
| +44 1842357 | Protected | — |
| +44 1842358 | Protected | — |
| +44 1842359 | Protected | — |
| +44 184236 | Allocated | (AQ) LIMITED |
| +44 184237 | Allocated | VoIP-Un Limited |
| +44 184238 | Allocated | Nationwide Telephone Assistance Ltd |
| +44 1842390 | Allocated | Resilient Limited |
| +44 1842391 | Allocated | Resilient Limited |
| +44 1842392 | Protected | — |
| +44 1842393 | Protected | — |
| +44 1842394 | Protected | — |
| +44 1842395 | Protected | — |
| +44 1842396 | Protected | — |
| +44 1842397 | Protected | — |
| +44 1842398 | Protected | — |
| +44 1842399 | Allocated | Resilient Limited |
| +44 184240 | Allocated | Net-Work Internet Ltd |
| +44 1842410 | Protected | — |
| +44 1842411 | Protected | — |
| +44 1842412 | Protected | — |
| +44 1842413 | Protected | — |
| +44 1842414 | Protected | — |
| +44 1842415 | Protected | — |
| +44 1842416 | Protected | — |
| +44 1842417 | Allocated | Digital Space Group Limited |
| +44 1842418 | Protected | — |
| +44 1842419 | Protected | — |
| +44 1842420 | Allocated | GCI Network Solutions Limited |
| +44 1842421 | Allocated | GCI Network Solutions Limited |
| +44 1842422 | Allocated | GCI Network Solutions Limited |
| +44 1842423 | Allocated | GCI Network Solutions Limited |
| +44 1842424 | Allocated | GCI Network Solutions Limited |
| +44 1842425 | Allocated | GCI Network Solutions Limited |
| +44 1842426 | Allocated | GCI Network Solutions Limited |
| +44 1842427 | Allocated | GCI Network Solutions Limited |
| +44 1842428 | Allocated | GCI Network Solutions Limited |
| +44 1842429 | Allocated | GCI Network Solutions Limited |
| +44 184243 | Allocated | Redcentric Solutions Limited |
| +44 184244 | Allocated | Telecom2 Limited |
| +44 184245 | Allocated | Digital Space Group Limited |
| +44 184246 | Allocated | Nodemax Limited |
| +44 184247 | Protected | — |
| +44 1842480 | Allocated | Voxbone SA |
| +44 1842481 | Protected | — |
| +44 1842482 | Protected | — |
| +44 1842483 | Protected | — |
| +44 1842484 | Protected | — |
| +44 1842485 | Protected | — |
| +44 1842486 | Protected | — |
| +44 1842487 | Protected | — |
| +44 1842488 | Protected | — |
| +44 1842489 | Protected | — |
| +44 184249 | Protected | — |
| +44 184250 | Allocated | Served Up Limited |
| +44 184251 | Allocated | Solutios Limited |
| +44 184252 | Allocated | Mars Communications Limited |
| +44 184253 | Quarantined | — |
| +44 184254 | Allocated | Andrews & Arnold (Numbers) Ltd |
| +44 1842550 | Allocated | Sky UK Limited |
| +44 1842551 | Allocated | Ziron Limited |
| +44 1842552 | Allocated | IOVOX Limited |
| +44 1842553 | Allocated | Content Guru Limited |
| +44 1842554 | Protected | — |
| +44 1842555 | Allocated | Datazero Ltd |
| +44 1842556 | Protected | — |
| +44 1842557 | Allocated | Media Hawk Ltd |
| +44 1842558 | Allocated | Kalnet4U Ltd |
| +44 1842559 | Allocated | XoverX Ltd |
| +44 184256 | Protected | — |
| +44 184257 | Allocated | Telecoms World Limited |
| +44 184258 | Allocated | CFL Communications Ltd |
| +44 184259 | Quarantined | — |
| +44 184260 | Protected | — |
| +44 184261 | Protected | — |
| +44 184262 | Allocated | Nexus Telecommunications Limited |
| +44 1842630 | Allocated | Sky UK Limited |
| +44 1842631 | Allocated | Calltracks Limited |
| +44 1842632 | Allocated | Windsor Telecom Limited |
| +44 1842633 | Allocated | Atomstream Limited |
| +44 1842634 | Allocated | Telappliant Limited |
| +44 1842635 | Allocated | Core Telecom Limited |
| +44 1842636 | Allocated | Suretec Systems Ltd |
| +44 1842637 | Allocated | Telephone Box Limited |
| +44 1842638 | Protected | — |
| +44 1842639 | Allocated | Phone Co-Op Numbering Limited |
| +44 1842640 | Protected | — |
| +44 1842641 | Allocated | Invosys Limited |
| +44 1842642 | Allocated | Nexbridge Communications Limited |
| +44 1842643 | Allocated | TeleWare Group Limited |
| +44 1842644 | Allocated | INTELLIGENT EXCHANGES LIMITED |
| +44 1842645 | Protected | — |
| +44 1842646 | Allocated | Simwood eSMS Limited |
| +44 1842647 | Allocated | ICC Networks Ltd |
| +44 1842648 | Allocated | 8x8 Communications UK Limited |
| +44 1842649 | Allocated | Bicom Systems EURL |
| +44 1842650 | Allocated | Nuso Cloud UK Limited |
| +44 1842651 | Allocated | YayYay Limited |
| +44 1842652 | Allocated | Convergence Group (wireless) Networks Limited |
| +44 1842653 | Allocated | Sky UK Limited |
| +44 1842654 | Allocated | Invoco Ltd |
| +44 1842655 | Allocated | Fuse 2 Communications Ltd |
| +44 1842656 | Allocated | Redwood Technologies Ltd |
| +44 1842657 | Protected | — |
| +44 1842658 | Protected | — |
Related lookups
- 01359 Pakenham17 km away
- 01284 Bury St Edmunds20 km away
- 01379 Diss24 km away
- 01760 Swaffham26 km away
- GCI Network Solutions Limited11 allocated blocks on 01842
- BT10 allocated blocks on 01842
- Sky UK Limited5 allocated blocks on 01842
- All UK towns A–ZDialling codes by town
- More Norfolk 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 01842
Where is area code 01842?
01842 is Ofcom's Thetford numbering area, in Norfolk, East of England England. Its exchange town is in Norfolk. From abroad, drop the 0 and dial +44 1842.
Do I need to dial 01842 for a local call?
Traditionally not from another 01842 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01842 first always works, and mobiles always need it.
How are 01842 numbers written?
Numbers on 01842 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01842 234 567. From abroad the leading zero is dropped: +44 1842 then the local number.
What was the 01842 area code before?
01842 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 0842. Old signage or stationery showing 0842 refers to the same Thetford numbers.
Which phone companies hold 01842 numbers?
Ofcom lists 91 providers with allocated blocks on 01842. The largest are GCI Network Solutions Limited with 11 of the 129 allocated blocks, BT with 10 of the 129 allocated blocks and Sky UK Limited with 5 of the 129 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 01842?
By distance between exchange towns, the nearest other codes are 01359 Pakenham (17 km), 01284 Bury St Edmunds (20 km), 01379 Diss (24 km) and 01760 Swaffham (26 km).
How do I report a scam call from a 01842 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.