UK area code
01366 area code — Downham Market
01366 is Ofcom’s Downham Market numbering area, in Norfolk, East of England England. 88 phone companies hold its 105 allocated number blocks. Its numbers are written like 01366 234 567. The nearest other codes are 01945 Wisbech (16 km) and 01553 Kings Lynn (17 km).
01366 at a glance
- Ofcom area name
- Downham Market
- County
- Norfolk
- Council area
- Norfolk
- Region
- East of England England
- Number format
- 01366 234 567 (4+6)
- Local calls
- Full number recommended
- Current code since
- 1995 (previously 0366)
- Allocated blocks
- 105 of 415 (25%) across 88 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 01366 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.
01366 history and number format
Number format: Numbers on 01366 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01366 234 567.
Before 1995: 01366 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 0366.
Local dialling: Traditionally not from another 01366 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01366 first always works, and mobiles always need it.
Allocation record: the oldest number block still visible on 01366 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 01366 number rings (see the weekly numbering changelog for every new allocation.)
Phone companies holding 01366 numbers
Every Ofcom range holder with blocks on 01366, 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 | 8 | 8 | 15 July 1994 | 28 August 2020 |
| Inet Telecoms Ltd (Voipfone) | 3 | 3 | 6 August 2009 | 6 August 2009 |
| Sky UK Limited | 3 | 3 | 1 July 2013 | 12 May 2025 |
| TalkTalk Communications Limited | 3 | 3 | 19 January 2012 | 13 February 2013 |
| Digital Space Group Limited | 2 | 2 | 30 November 2007 | 15 March 2016 |
| Digitech Solutions Global Limited | 2 | 2 | 28 April 2010 | 22 June 2012 |
| Fuse 2 Communications Ltd | 2 | 2 | 3 July 2017 | 22 January 2024 |
| GCI Network Solutions Limited | 2 | 2 | 25 April 2017 | 20 December 2023 |
| (AQ) LIMITED | 1 | 1 | 10 September 2012 | 10 September 2012 |
| 24 Seven Cloud Communications Ltd | 1 | 1 | 17 January 2020 | 17 January 2020 |
| 8x8 Communications UK Limited | 1 | 1 | 27 March 2012 | 27 March 2012 |
| AQL Wholesale Ltd | 1 | 1 | 4 January 2008 | 4 January 2008 |
| Adepteo Limited | 1 | 1 | 13 December 2016 | 13 December 2016 |
| Alnitak GmbH | 1 | 1 | 26 October 2016 | 26 October 2016 |
| Andrews & Arnold (Numbers) Ltd | 1 | 1 | 4 March 2009 | 4 March 2009 |
| Atomstream Limited | 1 | 1 | 26 April 2010 | 26 April 2010 |
| Barritel Limited | 1 | 1 | 3 July 2006 | 3 July 2006 |
| Belgacom International Carrier Services SA | 1 | 1 | 29 November 2019 | 29 November 2019 |
| Bicom Systems EURL | 1 | 1 | 2 March 2012 | 2 March 2012 |
| Bink Networks Ltd | 1 | 1 | 29 March 2023 | 29 March 2023 |
| CFL Communications Ltd | 1 | 1 | 9 July 2009 | 9 July 2009 |
| Colt Technology Services | 1 | 1 | 20 June 2016 | 20 June 2016 |
| Content Guru Limited | 1 | 1 | 12 October 2012 | 12 October 2012 |
| DIDWW Ireland Limited | 1 | 1 | 27 January 2020 | 27 January 2020 |
| DRD Communications Limited | 1 | 1 | 5 October 2023 | 5 October 2023 |
| Datazero Ltd | 1 | 1 | 3 December 2010 | 3 December 2010 |
| Dial 9 Communications Limited | 1 | 1 | 10 December 2019 | 10 December 2019 |
| EVE CONNECT LTD | 1 | 1 | 15 June 2022 | 15 June 2022 |
| Entanet International Ltd | 1 | 1 | 19 December 2007 | 19 December 2007 |
| Flextel Limited | 1 | 1 | 2 December 2005 | 2 December 2005 |
Showing the 30 largest of 88 holders.
Openreach exchanges at Downham Market
Exchanges Openreach lists at this location in its copper stop-sell programme, with the date new copper orders stop.
- Downham Market EADNMStop sell 08-Feb-23 · Tranche 7
All number blocks on 01366first 200 of 415, by prefix
| Prefix | Status | Range holder |
|---|---|---|
| +44 136600 | Protected | — |
| +44 136601 | Protected | — |
| +44 136602 | Protected | — |
| +44 136603 | Protected | — |
| +44 136604 | Protected | — |
| +44 136605 | Protected | — |
| +44 136606 | Protected | — |
| +44 136607 | Protected | — |
| +44 136608 | Protected | — |
| +44 136609 | Protected | — |
| +44 136610 | Protected | — |
| +44 136611 | Protected | — |
| +44 136612 | Protected | — |
| +44 136613 | Protected | — |
| +44 136614 | Protected | — |
| +44 136615 | Protected | — |
| +44 136616 | Protected | — |
| +44 136617 | Protected | — |
| +44 136618 | Protected | — |
| +44 136619 | Protected | — |
| +44 136620 | Allocated | AQL Wholesale Ltd |
| +44 1366210 | Protected | — |
| +44 1366211 | Protected | — |
| +44 1366212 | Protected | — |
| +44 1366213 | Protected | — |
| +44 1366214 | Protected | — |
| +44 1366215 | Protected | — |
| +44 1366216 | Protected | — |
| +44 1366217 | Allocated | Digital Space Group Limited |
| +44 1366218 | Protected | — |
| +44 1366219 | Protected | — |
| +44 1366220 | Allocated | Voxbone SA |
| +44 1366221 | Protected | — |
| +44 1366222 | Protected | — |
| +44 1366223 | Protected | — |
| +44 1366224 | Protected | — |
| +44 1366225 | Protected | — |
| +44 1366226 | Protected | — |
| +44 1366227 | Protected | — |
| +44 1366228 | Protected | — |
| +44 1366229 | Protected | — |
| +44 136623 | Allocated | Telecom2 Limited |
| +44 136624 | Allocated | Nationwide Telephone Assistance Ltd |
| +44 136625 | Allocated | (AQ) LIMITED |
| +44 136626 | Allocated | Digital Space Group Limited |
| +44 136627 | Allocated | VoIP-Un Limited |
| +44 136628 | Allocated | Entanet International Ltd |
| +44 136629 | Allocated | Voiceflex Limited |
| +44 136630 | Allocated | Magrathea Telecommunications Limited |
| +44 136631 | Allocated | Gamma Telecom Holdings Limited |
| +44 136632 | Allocated | BT |
| +44 136633 | Allocated | GCI Network Solutions Limited |
| +44 136634 | Allocated | BT |
| +44 136635 | Allocated | Vodafone Ltd (C&W) |
| +44 136636 | Allocated | BT |
| +44 136637 | Allocated | BT |
| +44 136638 | Allocated | BT |
| +44 1366390 | Allocated | Linear Telecoms Limited |
| +44 1366391 | Allocated | Orbtalk Limited |
| +44 1366392 | Protected | — |
| +44 1366393 | Allocated | Invoco Ltd |
| +44 1366394 | Allocated | Internexus Networks Limited |
| +44 1366395 | Allocated | Minotaur Telecom Limited |
| +44 1366396 | Protected | — |
| +44 1366397 | Allocated | Bicom Systems EURL |
| +44 1366398 | Allocated | 8x8 Communications UK Limited |
| +44 1366399 | Allocated | Simwood eSMS Limited |
| +44 136640 | Allocated | Nodemax Limited |
| +44 136641 | Protected | — |
| +44 136642 | Allocated | Solutios Limited |
| +44 136643 | Quarantined | — |
| +44 136644 | Allocated | Net-Work Internet Ltd |
| +44 136645 | Allocated | Mars Communications Limited |
| +44 136646 | Allocated | Andrews & Arnold (Numbers) Ltd |
| +44 136647 | Allocated | Nexus Telecommunications Limited |
| +44 136648 | Allocated | Invade International Ltd |
| +44 136649 | Quarantined | — |
| +44 136650 | Allocated | BT |
| +44 136651 | Allocated | Flextel Limited |
| +44 1366520 | Allocated | Digitech Solutions Global Limited |
| +44 1366521 | Free | — |
| +44 1366522 | Free | — |
| +44 1366523 | Free | — |
| +44 1366524 | Free | — |
| +44 1366525 | Free | — |
| +44 1366526 | Free | — |
| +44 1366527 | Free | — |
| +44 1366528 | Free | — |
| +44 1366529 | Free | — |
| +44 136653 | Protected | — |
| +44 136654 | Allocated | Barritel Limited |
| +44 136655 | Protected | — |
| +44 136656 | Allocated | TTNC Limited |
| +44 1366570 | Protected | — |
| +44 1366571 | Protected | — |
| +44 1366572 | Protected | — |
| +44 1366573 | Protected | — |
| +44 1366574 | Protected | — |
| +44 1366575 | Protected | — |
| +44 1366576 | Protected | — |
| +44 1366577 | Allocated | Spitfire Network Services Limited |
| +44 1366578 | Protected | — |
| +44 1366579 | Protected | — |
| +44 136658 | Allocated | TelNG Limited |
| +44 136659 | Allocated | Localphone Limited |
| +44 136660 | Allocated | CFL Communications Ltd |
| +44 1366610 | Allocated | Inet Telecoms Ltd (Voipfone) |
| +44 1366611 | Allocated | Inet Telecoms Ltd (Voipfone) |
| +44 1366612 | Protected | — |
| +44 1366613 | Protected | — |
| +44 1366614 | Protected | — |
| +44 1366615 | Protected | — |
| +44 1366616 | Protected | — |
| +44 1366617 | Allocated | Inet Telecoms Ltd (Voipfone) |
| +44 1366618 | Protected | — |
| +44 1366619 | Protected | — |
| +44 136662 | Protected | — |
| +44 136663 | Allocated | TeleWare Group Limited |
| +44 1366640 | Allocated | Digitech Solutions Global Limited |
| +44 1366641 | Allocated | M247 Ltd |
| +44 1366642 | Allocated | Telappliant Limited |
| +44 1366643 | Allocated | VoiceHost Limited |
| +44 1366644 | Allocated | Atomstream Limited |
| +44 1366645 | Allocated | Suretec Systems Ltd |
| +44 1366646 | Allocated | Windsor Telecom Limited |
| +44 1366647 | Allocated | Telephone Box Limited |
| +44 1366648 | Allocated | GCI Network Solutions Limited |
| +44 1366649 | Allocated | Datazero Ltd |
| +44 1366650 | Protected | — |
| +44 1366651 | Allocated | Phone Co-Op Numbering Limited |
| +44 1366652 | Allocated | Nexbridge Communications Limited |
| +44 1366653 | Protected | — |
| +44 1366654 | Allocated | INTELLIGENT EXCHANGES LIMITED |
| +44 1366655 | Protected | — |
| +44 1366656 | Allocated | Invosys Limited |
| +44 1366657 | Allocated | Hello Telecom (UK) Limited |
| +44 1366658 | Allocated | TalkTalk Communications Limited |
| +44 1366659 | Allocated | Sky UK Limited |
| +44 1366660 | Allocated | Redwood Technologies Ltd |
| +44 1366661 | Protected | — |
| +44 1366662 | Allocated | Alnitak GmbH |
| +44 1366663 | Allocated | Adepteo Limited |
| +44 1366664 | Allocated | Colt Technology Services |
| +44 1366665 | Protected | — |
| +44 1366666 | Allocated | YayYay Limited |
| +44 1366667 | Allocated | Sky UK Limited |
| +44 1366668 | Allocated | Zapappi Ltd |
| +44 1366669 | Protected | — |
| +44 1366670 | Allocated | EVE CONNECT LTD |
| +44 1366671 | Allocated | Belgacom International Carrier Services SA |
| +44 1366672 | Allocated | Dial 9 Communications Limited |
| +44 1366673 | Allocated | 24 Seven Cloud Communications Ltd |
| +44 1366674 | Allocated | VOXYONDER NETWORK SERVICES UK LTD |
| +44 1366675 | Allocated | Fuse 2 Communications Ltd |
| +44 1366676 | Allocated | I.T Communications Limited |
| +44 1366677 | Allocated | Number Services Ltd. |
| +44 1366678 | Allocated | IP Voice Networks Ltd |
| +44 1366679 | Allocated | DIDWW Ireland Limited |
| +44 1366680 | Allocated | ICC Networks Ltd |
| +44 1366681 | Allocated | IOVOX Limited |
| +44 1366682 | Allocated | Ziron Limited |
| +44 1366683 | Allocated | Kalnet4U Ltd |
| +44 1366684 | Allocated | Nuso Cloud UK Limited |
| +44 1366685 | Allocated | Fuse 2 Communications Ltd |
| +44 1366686 | Allocated | Content Guru Limited |
| +44 1366687 | Allocated | XoverX Ltd |
| +44 1366688 | Protected | — |
| +44 1366689 | Protected | — |
| +44 1366690 | Allocated | SiPalto Ltd |
| +44 1366691 | Allocated | BT |
| +44 1366692 | Allocated | Sky UK Limited |
| +44 1366693 | Allocated | KCOM Group Ltd |
| +44 1366694 | Free | — |
| +44 1366695 | Free | — |
| +44 1366696 | Allocated | Media Hawk Ltd |
| +44 1366697 | Allocated | Bink Networks Ltd |
| +44 1366698 | Allocated | Mi Telecom Limited |
| +44 1366699 | Allocated | ICUK Computing Services Limited |
| +44 1366700 | Protected | — |
| +44 1366701 | Protected | — |
| +44 1366702 | Protected | — |
| +44 1366703 | Protected | — |
| +44 1366704 | Protected | — |
| +44 1366705 | Protected | — |
| +44 1366706 | Protected | — |
| +44 1366707 | Protected | — |
| +44 1366708 | Protected | — |
| +44 1366709 | Protected | — |
| +44 1366710 | Protected | — |
| +44 1366711 | Protected | — |
| +44 1366712 | Protected | — |
| +44 1366713 | Protected | — |
| +44 1366714 | Protected | — |
| +44 1366715 | Protected | — |
| +44 1366716 | Protected | — |
| +44 1366717 | Protected | — |
| +44 1366718 | Protected | — |
| +44 1366719 | Protected | — |
| +44 136672 | Allocated | BT |
| +44 1366730 | Protected | — |
Related lookups
- 01945 Wisbech16 km away
- 01553 Kings Lynn17 km away
- 01760 Swaffham22 km away
- 01353 Ely24 km away
- BT8 allocated blocks on 01366
- Inet Telecoms Ltd (Voipfone)3 allocated blocks on 01366
- Sky UK Limited3 allocated blocks on 01366
- 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 01366
Where is area code 01366?
01366 is Ofcom's Downham Market numbering area, in Norfolk, East of England England. Its exchange town is in Norfolk. From abroad, drop the 0 and dial +44 1366.
Do I need to dial 01366 for a local call?
Traditionally not from another 01366 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01366 first always works, and mobiles always need it.
How are 01366 numbers written?
Numbers on 01366 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01366 234 567. From abroad the leading zero is dropped: +44 1366 then the local number.
What was the 01366 area code before?
01366 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 0366. Old signage or stationery showing 0366 refers to the same Downham Market numbers.
Which phone companies hold 01366 numbers?
Ofcom lists 88 providers with allocated blocks on 01366. The largest are BT with 8 of the 105 allocated blocks, Inet Telecoms Ltd (Voipfone) with 3 of the 105 allocated blocks and Sky UK Limited with 3 of the 105 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 01366?
By distance between exchange towns, the nearest other codes are 01945 Wisbech (16 km), 01553 Kings Lynn (17 km), 01760 Swaffham (22 km) and 01353 Ely (24 km).
How do I report a scam call from a 01366 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.