UK area code
01851 area code — Stornoway
01851 is Ofcom’s Stornoway numbering area, covering Stornoway and Great Bernera, in Na h-Eileanan Siar, Scotland. 81 phone companies hold its 154 allocated number blocks. Its numbers are written like 01851 234 567. The nearest other codes are 01859 Harris (42 km) and 01445 Gairloch (67 km).
01851 at a glance
- Ofcom area name
- Stornoway
- Places on this code
- Stornoway 018512 018513 018515 018517 018518
- Great Bernera 018514 018516 018519
- Council area
- Na h-Eileanan Siar
- Country
- Scotland
- Number format
- 01851 234 567 (4+6)
- Local calls
- Full number recommended
- Current code since
- 1995 (previously 0851)
- Allocated blocks
- 154 of 559 (28%) across 81 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 01851 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 Police Scotland on 101. In Scotland fraud goes to Police Scotland rather than Report Fraud.
01851 history and number format
Number format: Numbers on 01851 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01851 234 567.
Before 1995: 01851 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 0851.
Local dialling: Traditionally not from another 01851 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01851 first always works, and mobiles always need it.
Allocation record: the oldest number block still visible on 01851 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 01851 number rings (see the weekly numbering changelog for every new allocation.)
Phone companies holding 01851 numbers
Every Ofcom range holder with blocks on 01851, 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 | 16 | 16 | 15 July 1994 | 23 April 1996 |
| Gamma Telecom Holdings Limited | 8 | 8 | 14 May 2009 | 19 November 2012 |
| Magrathea Telecommunications Limited | 6 | 6 | 24 September 2004 | 17 November 2011 |
| TalkTalk Communications Limited | 4 | 4 | 4 October 2007 | 12 February 2013 |
| Fuse 2 Communications Ltd | 3 | 3 | 3 July 2017 | 22 January 2024 |
| Vodafone Ltd (C&W) | 3 | 3 | 6 September 2013 | 12 November 2021 |
| 8x8 Communications UK Limited | 2 | 2 | 18 April 2012 | 18 April 2012 |
| Adepteo Limited | 2 | 2 | 6 December 2016 | 6 December 2016 |
| Alnitak GmbH | 2 | 2 | 20 September 2017 | 20 September 2017 |
| Atomstream Limited | 2 | 2 | 12 April 2010 | 12 April 2010 |
| Barritel Limited | 2 | 2 | 2 October 2006 | 3 August 2011 |
| Belgacom International Carrier Services SA | 2 | 2 | 31 January 2020 | 21 October 2020 |
| Bink Networks Ltd | 2 | 2 | 3 April 2023 | 11 April 2023 |
| Convergence Group (wireless) Networks Limited | 2 | 2 | 21 May 2019 | 21 May 2019 |
| DIDWW Ireland Limited | 2 | 2 | 22 January 2019 | 27 January 2020 |
| DRD Communications Limited | 2 | 2 | 5 October 2023 | 3 November 2023 |
| Dial 9 Communications Limited | 2 | 2 | 8 January 2020 | 8 January 2020 |
| Digital Space Group Limited | 2 | 2 | 23 May 2008 | 15 March 2016 |
| Hello Telecom (UK) Limited | 2 | 2 | 24 November 2011 | 20 July 2012 |
| ICUK Computing Services Limited | 2 | 2 | 17 June 2020 | 23 November 2022 |
| IOVOX Limited | 2 | 2 | 4 July 2012 | 22 August 2013 |
| IP Voice Networks Ltd | 2 | 2 | 20 September 2017 | 20 September 2017 |
| Inet Telecoms Ltd (Voipfone) | 2 | 2 | 21 October 2011 | 3 February 2015 |
| Internexus Networks Limited | 2 | 2 | 22 November 2011 | 22 November 2011 |
| KCOM Group Ltd | 2 | 2 | 8 September 2022 | 8 September 2022 |
| Kalnet4U Ltd | 2 | 2 | 3 June 2013 | 21 March 2016 |
| Linear Telecoms Limited | 2 | 2 | 18 October 2010 | 18 October 2010 |
| Localphone Limited | 2 | 2 | 23 May 2007 | 23 May 2007 |
| Minotaur Telecom Limited | 2 | 2 | 5 February 2013 | 5 February 2013 |
| Number Services Ltd. | 2 | 2 | 22 November 2018 | 22 November 2018 |
Showing the 30 largest of 81 holders.
All number blocks on 01851first 200 of 559, by prefix
| Prefix | Status | Range holder |
|---|---|---|
| +44 185100 | Protected | — |
| +44 185101 | Protected | — |
| +44 185102 | Protected | — |
| +44 185103 | Protected | — |
| +44 185104 | Protected | — |
| +44 185105 | Protected | — |
| +44 185106 | Protected | — |
| +44 185107 | Protected | — |
| +44 185108 | Protected | — |
| +44 185109 | Protected | — |
| +44 185110 | Protected | — |
| +44 185111 | Protected | — |
| +44 185112 | Protected | — |
| +44 185113 | Protected | — |
| +44 185114 | Protected | — |
| +44 185115 | Protected | — |
| +44 185116 | Protected | — |
| +44 185117 | Protected | — |
| +44 185118 | Protected | — |
| +44 185119 | Protected | — |
| +44 1851200 | Allocated | Linear Telecoms Limited |
| +44 1851201 | Allocated | Redwood Technologies Ltd |
| +44 1851202 | Allocated | Fuse 2 Communications Ltd |
| +44 1851203 | Allocated | Sky UK Limited |
| +44 1851204 | Allocated | Convergence Group (wireless) Networks Limited |
| +44 1851205 | Allocated | YayYay Limited |
| +44 1851206 | Allocated | TGL Services (UK) Ltd |
| +44 1851207 | Allocated | Alnitak GmbH |
| +44 1851208 | Allocated | DIDWW Ireland Limited |
| +44 1851209 | Protected | — |
| +44 1851210 | Protected | — |
| +44 1851211 | Allocated | DRD Communications Limited |
| +44 1851212 | Protected | — |
| +44 1851213 | Protected | — |
| +44 1851214 | Protected | — |
| +44 1851215 | Protected | — |
| +44 1851216 | Protected | — |
| +44 1851217 | Protected | — |
| +44 1851218 | Protected | — |
| +44 1851219 | Protected | — |
| +44 1851220 | Protected | — |
| +44 1851221 | Allocated | Adepteo Limited |
| +44 1851222 | Allocated | Kalnet4U Ltd |
| +44 1851223 | Allocated | IP Voice Networks Ltd |
| +44 1851224 | Allocated | Number Services Ltd. |
| +44 1851225 | Allocated | EVE CONNECT LTD |
| +44 1851226 | Allocated | Zapappi Ltd |
| +44 1851227 | Allocated | Belgacom International Carrier Services SA |
| +44 1851228 | Allocated | Dial 9 Communications Limited |
| +44 1851229 | Allocated | DIDWW Ireland Limited |
| +44 185123 | Allocated | Barritel Limited |
| +44 185124 | Allocated | TTNC Limited |
| +44 1851250 | Allocated | Digitech Solutions Global Limited |
| +44 1851251 | Free | — |
| +44 1851252 | Allocated | Reality Network Services Limited |
| +44 1851253 | Free | — |
| +44 1851254 | Allocated | VOXYONDER NETWORK SERVICES UK LTD |
| +44 1851255 | Protected | — |
| +44 1851256 | Protected | — |
| +44 1851257 | Protected | — |
| +44 1851258 | Protected | — |
| +44 1851259 | Protected | — |
| +44 185126 | Allocated | TelNG Limited |
| +44 1851270 | Protected | — |
| +44 1851271 | Protected | — |
| +44 1851272 | Protected | — |
| +44 1851273 | Protected | — |
| +44 1851274 | Protected | — |
| +44 1851275 | Protected | — |
| +44 1851276 | Protected | — |
| +44 1851277 | Allocated | Spitfire Network Services Limited |
| +44 1851278 | Protected | — |
| +44 1851279 | Protected | — |
| +44 1851280 | Allocated | Voiceflex Limited |
| +44 1851281 | Allocated | Voiceflex Limited |
| +44 1851282 | Allocated | (AQ) LIMITED |
| +44 1851283 | Allocated | AQL Wholesale Ltd |
| +44 1851284 | Allocated | Digital Space Group Limited |
| +44 1851285 | Allocated | Redcentric Solutions Limited |
| +44 1851286 | Allocated | Telecom2 Limited |
| +44 1851287 | Protected | — |
| +44 1851288 | Allocated | TalkTalk Communications Limited |
| +44 1851289 | Allocated | Telecoms World Limited |
| +44 185129 | Protected | — |
| +44 1851300 | Allocated | Mars Communications Limited |
| +44 1851301 | Allocated | CFL Communications Ltd |
| +44 1851302 | Allocated | Solutios Limited |
| +44 1851303 | Quarantined | — |
| +44 1851304 | Allocated | Nexus Telecommunications Limited |
| +44 1851305 | Protected | — |
| +44 1851306 | Allocated | Atomstream Limited |
| +44 1851307 | Allocated | Gamma Telecom Holdings Limited |
| +44 1851308 | Protected | — |
| +44 1851309 | Protected | — |
| +44 1851310 | Free | — |
| +44 1851311 | Free | — |
| +44 1851312 | Free | — |
| +44 1851313 | Allocated | KCOM Group Ltd |
| +44 1851314 | Free | — |
| +44 1851315 | Free | — |
| +44 1851316 | Free | — |
| +44 1851317 | Free | — |
| +44 1851318 | Free | — |
| +44 1851319 | Allocated | ICUK Computing Services Limited |
| +44 1851320 | Free | — |
| +44 1851321 | Free | — |
| +44 1851322 | Allocated | Bink Networks Ltd |
| +44 1851323 | Free | — |
| +44 1851324 | Free | — |
| +44 1851325 | Free | — |
| +44 1851326 | Free | — |
| +44 1851327 | Free | — |
| +44 1851328 | Free | — |
| +44 1851329 | Free | — |
| +44 1851330 | Protected | — |
| +44 1851331 | Protected | — |
| +44 1851332 | Protected | — |
| +44 1851333 | Protected | — |
| +44 1851334 | Protected | — |
| +44 1851335 | Protected | — |
| +44 1851336 | Protected | — |
| +44 1851337 | Protected | — |
| +44 1851338 | Protected | — |
| +44 1851339 | Protected | — |
| +44 1851340 | Protected | — |
| +44 1851341 | Protected | — |
| +44 1851342 | Protected | — |
| +44 1851343 | Protected | — |
| +44 1851344 | Protected | — |
| +44 1851345 | Protected | — |
| +44 1851346 | Protected | — |
| +44 1851347 | Protected | — |
| +44 1851348 | Protected | — |
| +44 1851349 | Protected | — |
| +44 1851350 | Protected | — |
| +44 1851351 | Protected | — |
| +44 1851352 | Protected | — |
| +44 1851353 | Protected | — |
| +44 1851354 | Protected | — |
| +44 1851355 | Protected | — |
| +44 1851356 | Protected | — |
| +44 1851357 | Protected | — |
| +44 1851358 | Protected | — |
| +44 1851359 | Protected | — |
| +44 1851360 | Protected | — |
| +44 1851361 | Protected | — |
| +44 1851362 | Protected | — |
| +44 1851363 | Protected | — |
| +44 1851364 | Protected | — |
| +44 1851365 | Protected | — |
| +44 1851366 | Protected | — |
| +44 1851367 | Protected | — |
| +44 1851368 | Protected | — |
| +44 1851369 | Protected | — |
| +44 1851370 | Protected | — |
| +44 1851371 | Protected | — |
| +44 1851372 | Protected | — |
| +44 1851373 | Protected | — |
| +44 1851374 | Protected | — |
| +44 1851375 | Protected | — |
| +44 1851376 | Protected | — |
| +44 1851377 | Protected | — |
| +44 1851378 | Protected | — |
| +44 1851379 | Protected | — |
| +44 1851380 | Protected | — |
| +44 1851381 | Protected | — |
| +44 1851382 | Protected | — |
| +44 1851383 | Protected | — |
| +44 1851384 | Protected | — |
| +44 1851385 | Protected | — |
| +44 1851386 | Protected | — |
| +44 1851387 | Protected | — |
| +44 1851388 | Protected | — |
| +44 1851389 | Protected | — |
| +44 1851390 | Protected | — |
| +44 1851391 | Protected | — |
| +44 1851392 | Protected | — |
| +44 1851393 | Protected | — |
| +44 1851394 | Protected | — |
| +44 1851395 | Protected | — |
| +44 1851396 | Protected | — |
| +44 1851397 | Protected | — |
| +44 1851398 | Protected | — |
| +44 1851399 | Protected | — |
| +44 185140 | Allocated | TTNC Limited |
| +44 1851410 | Protected | — |
| +44 1851411 | Protected | — |
| +44 1851412 | Protected | — |
| +44 1851413 | Protected | — |
| +44 1851414 | Protected | — |
| +44 1851415 | Protected | — |
| +44 1851416 | Protected | — |
| +44 1851417 | Allocated | Spitfire Network Services Limited |
| +44 1851418 | Protected | — |
| +44 1851419 | Protected | — |
| +44 1851420 | Protected | — |
| +44 1851421 | Protected | — |
| +44 1851422 | Protected | — |
| +44 1851423 | Protected | — |
| +44 1851424 | Protected | — |
Related lookups
- 01859 Harris42 km away
- 01445 Gairloch67 km away
- 01571 Lochinver68 km away
- 01971 Scourie74 km away
- BT16 allocated blocks on 01851
- Gamma Telecom Holdings Limited8 allocated blocks on 01851
- Magrathea Telecommunications Limited6 allocated blocks on 01851
- All UK towns A–ZDialling codes by town
- More Outer Hebrides 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 01851
Where is area code 01851?
01851 is Ofcom's Stornoway numbering area, in Na h-Eileanan Siar, Scotland. Its exchange towns are in Na h-Eileanan Siar. From abroad, drop the 0 and dial +44 1851.
Which places use the 01851 code?
Ofcom splits 01851 into 2 areas by the first digit of the local number: Stornoway (018512, 018513, 018515, 018517, 018518); Great Bernera (018514, 018516, 018519).
Do I need to dial 01851 for a local call?
Traditionally not from another 01851 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01851 first always works, and mobiles always need it.
How are 01851 numbers written?
Numbers on 01851 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01851 234 567. From abroad the leading zero is dropped: +44 1851 then the local number.
What was the 01851 area code before?
01851 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 0851. Old signage or stationery showing 0851 refers to the same Stornoway numbers.
Which phone companies hold 01851 numbers?
Ofcom lists 81 providers with allocated blocks on 01851. The largest are BT with 16 of the 154 allocated blocks, Gamma Telecom Holdings Limited with 8 of the 154 allocated blocks and Magrathea Telecommunications Limited with 6 of the 154 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 01851?
By distance between exchange towns, the nearest other codes are 01859 Harris (42 km), 01445 Gairloch (67 km), 01571 Lochinver (68 km) and 01971 Scourie (74 km).
How do I report a scam call from a 01851 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 Police Scotland on 101. Unwanted sales calls go to the ICO after registering with the Telephone Preference Service.