UK area code
01403 area code — Horsham
01403 is Ofcom’s Horsham numbering area, in West Sussex, South East England. 98 phone companies hold its 172 allocated number blocks. Its numbers are written like 01403 234 567. The nearest other codes are 01293 Crawley (11 km) and 01798 Pulborough (17 km).
01403 at a glance
- Ofcom area name
- Horsham
- County
- West Sussex
- Council area
- West Sussex
- Region
- South East England
- Number format
- 01403 234 567 (4+6)
- Local calls
- Full number recommended
- Current code since
- 1995 (previously 0403)
- Allocated blocks
- 172 of 460 (37%) across 98 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.
What people check and report about 01403 numbers
From searches in our lookup form since 13 May 2026 and the verdicts and reports visitors left. A check means someone typed the number in, usually after a missed call.
Caller verdicts on 01403 numbers: 1
1 safe. Too few to show shares yet.
Most-reported and most-checked 01403 numbers
| Number | Verdicts | Reports | People checking |
|---|---|---|---|
| 01403 217487 | 1 safe | — | 1 |
If a 01403 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.
01403 history and number format
Number format: Numbers on 01403 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01403 234 567.
Before 1995: 01403 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 0403.
Local dialling: Traditionally not from another 01403 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01403 first always works, and mobiles always need it.
Allocation record: the oldest number block still visible on 01403 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 01403 number rings (see the weekly numbering changelog for every new allocation.)
Phone companies holding 01403 numbers
Every Ofcom range holder with blocks on 01403, 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 | 26 | 26 | 15 July 1994 | 20 March 2024 |
| Vodafone Ltd (C&W) | 18 | 18 | 6 September 2013 | 10 November 2021 |
| Gamma Telecom Holdings Limited | 8 | 8 | 1 March 2004 | 30 January 2025 |
| Sky UK Limited | 8 | 8 | 2 July 2013 | 27 October 2022 |
| TalkTalk Communications Limited | 5 | 5 | 4 May 2007 | 21 November 2018 |
| Colt Technology Services | 4 | 4 | 30 January 2013 | 19 December 2022 |
| GCI Network Solutions Limited | 3 | 3 | 25 April 2017 | 20 December 2023 |
| Resilient Limited | 3 | 3 | 18 May 2012 | 18 May 2012 |
| DRD Communications Limited | 2 | 2 | 5 October 2023 | 5 October 2023 |
| Digital Space Group Limited | 2 | 2 | 30 November 2007 | 15 March 2016 |
| Digitech Solutions Global Limited | 2 | 2 | 29 April 2010 | 25 June 2012 |
| Fuse 2 Communications Ltd | 2 | 2 | 4 July 2017 | 22 January 2024 |
| Media Hawk Ltd | 2 | 2 | 11 November 2015 | 23 April 2019 |
| Six Degrees Technology Group Limited | 2 | 2 | 14 January 2020 | 14 January 2020 |
| Voiceflex Limited | 2 | 2 | 25 September 2007 | 18 July 2023 |
| (AQ) LIMITED | 1 | 1 | 19 October 2011 | 19 October 2011 |
| 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 | 1 November 2004 | 1 November 2004 |
| Adepteo Limited | 1 | 1 | 17 January 2017 | 17 January 2017 |
| Alnitak GmbH | 1 | 1 | 6 April 2016 | 6 April 2016 |
| Andrews & Arnold (Numbers) Ltd | 1 | 1 | 5 March 2009 | 5 March 2009 |
| Atomstream Limited | 1 | 1 | 22 March 2010 | 22 March 2010 |
| Barritel Limited | 1 | 1 | 2 November 2006 | 2 November 2006 |
| Belgacom International Carrier Services SA | 1 | 1 | 6 February 2020 | 6 February 2020 |
| Bicom Systems EURL | 1 | 1 | 2 March 2012 | 2 March 2012 |
| Bink Networks Ltd | 1 | 1 | 3 April 2023 | 3 April 2023 |
| Buzz Networks Limited | 1 | 1 | 4 March 2010 | 4 March 2010 |
| CFL Communications Ltd | 1 | 1 | 10 July 2009 | 10 July 2009 |
| Calltracks Limited | 1 | 1 | 20 September 2013 | 20 September 2013 |
Showing the 30 largest of 98 holders.
Openreach exchanges at Horsham
Exchanges Openreach lists at this location in its copper stop-sell programme, with the date new copper orders stop.
- Faygate(FYG) SDFYGTStop sell 19-Aug-25 · Tranche 17
- Horsham (HMC) SDHRSHMStop sell 14-Feb-26 · Tranche 19
All number blocks on 01403first 200 of 460, by prefix
| Prefix | Status | Range holder |
|---|---|---|
| +44 140300 | Protected | — |
| +44 140301 | Protected | — |
| +44 140302 | Protected | — |
| +44 140303 | Allocated | Vodafone Ltd (C&W) |
| +44 140304 | Protected | — |
| +44 140305 | Protected | — |
| +44 140306 | Protected | — |
| +44 140307 | Protected | — |
| +44 140308 | Protected | — |
| +44 140309 | Protected | — |
| +44 140310 | Protected | — |
| +44 140311 | Protected | — |
| +44 140312 | Protected | — |
| +44 140313 | Protected | — |
| +44 140314 | Protected | — |
| +44 140315 | Protected | — |
| +44 140316 | Protected | — |
| +44 140317 | Protected | — |
| +44 140318 | Protected | — |
| +44 140319 | Protected | — |
| +44 140320 | Protected | — |
| +44 140321 | Allocated | BT |
| +44 140322 | Allocated | BT |
| +44 140323 | Allocated | BT |
| +44 140324 | Allocated | BT |
| +44 140325 | Allocated | BT |
| +44 140326 | Allocated | BT |
| +44 140327 | Allocated | BT |
| +44 140328 | Allocated | BT |
| +44 140329 | Allocated | TTNC Limited |
| +44 140330 | Allocated | Redcentric Solutions Limited |
| +44 140331 | Allocated | Served Up Limited |
| +44 140332 | Allocated | BT |
| +44 140333 | Allocated | Gamma Telecom Holdings Limited |
| +44 140334 | Allocated | Vodafone Ltd (C&W) |
| +44 140335 | Allocated | BT |
| +44 140336 | Protected | — |
| +44 1403370 | Allocated | Linear Telecoms Limited |
| +44 1403371 | Allocated | Invoco Ltd |
| +44 1403372 | Allocated | Sky UK Limited |
| +44 1403373 | Allocated | Hello Telecom (UK) Limited |
| +44 1403374 | Allocated | Internexus Networks Limited |
| +44 1403375 | Allocated | Bicom Systems EURL |
| +44 1403376 | Allocated | 8x8 Communications UK Limited |
| +44 1403377 | Protected | — |
| +44 1403378 | Allocated | ICC Networks Ltd |
| +44 1403379 | Allocated | Ziron Limited |
| +44 1403380 | Protected | — |
| +44 1403381 | Protected | — |
| +44 1403382 | Protected | — |
| +44 1403383 | Protected | — |
| +44 1403384 | Protected | — |
| +44 1403385 | Protected | — |
| +44 1403386 | Protected | — |
| +44 1403387 | Protected | — |
| +44 1403388 | Protected | — |
| +44 1403389 | Protected | — |
| +44 140339 | Allocated | GCI Network Solutions Limited |
| +44 1403400 | Allocated | Vodafone Ltd (C&W) |
| +44 1403401 | Allocated | Vodafone Ltd (C&W) |
| +44 1403402 | Allocated | Vodafone Ltd (C&W) |
| +44 1403403 | Allocated | Vodafone Ltd (C&W) |
| +44 1403404 | Protected | — |
| +44 1403405 | Protected | — |
| +44 1403406 | Protected | — |
| +44 1403407 | Protected | — |
| +44 1403408 | Allocated | Vodafone Ltd (C&W) |
| +44 1403409 | Allocated | Vodafone Ltd (C&W) |
| +44 1403410 | Protected | — |
| +44 1403411 | Protected | — |
| +44 1403412 | Protected | — |
| +44 1403413 | Protected | — |
| +44 1403414 | Protected | — |
| +44 1403415 | Protected | — |
| +44 1403416 | Protected | — |
| +44 1403417 | Protected | — |
| +44 1403418 | Protected | — |
| +44 1403419 | Protected | — |
| +44 1403420 | Protected | — |
| +44 1403421 | Protected | — |
| +44 1403422 | Protected | — |
| +44 1403423 | Protected | — |
| +44 1403424 | Protected | — |
| +44 1403425 | Protected | — |
| +44 1403426 | Protected | — |
| +44 1403427 | Protected | — |
| +44 1403428 | Protected | — |
| +44 1403429 | Protected | — |
| +44 1403430 | Allocated | Media Hawk Ltd |
| +44 1403431 | Free | — |
| +44 1403432 | Allocated | Sky UK Limited |
| +44 1403433 | Protected | — |
| +44 1403434 | Allocated | I.T Communications Limited |
| +44 1403435 | Allocated | Adepteo Limited |
| +44 1403436 | Allocated | Virgin Media Limited |
| +44 1403437 | Allocated | Orbtalk Limited |
| +44 1403438 | Allocated | Alnitak GmbH |
| +44 1403439 | Allocated | Number Services Ltd. |
| +44 140344 | Allocated | Flextel Limited |
| +44 1403450 | Allocated | Digitech Solutions Global Limited |
| +44 1403451 | Allocated | TalkTalk Communications Limited |
| +44 1403452 | Allocated | Sky UK Limited |
| +44 1403453 | Allocated | IOVOX Limited |
| +44 1403454 | Allocated | Content Guru Limited |
| +44 1403455 | Protected | — |
| +44 1403456 | Allocated | Colt Technology Services |
| +44 1403457 | Allocated | HAVENSTOKE COMMUNICATIONS LTD |
| +44 1403458 | Allocated | Simwood eSMS Limited |
| +44 1403459 | Allocated | XoverX Ltd |
| +44 1403460 | Allocated | Vodafone Ltd (C&W) |
| +44 1403461 | Allocated | Vodafone Ltd (C&W) |
| +44 1403462 | Allocated | Vodafone Ltd (C&W) |
| +44 1403463 | Allocated | Vodafone Ltd (C&W) |
| +44 1403464 | Allocated | Vodafone Ltd (C&W) |
| +44 1403465 | Allocated | Vodafone Ltd (C&W) |
| +44 1403466 | Allocated | Vodafone Ltd (C&W) |
| +44 1403467 | Protected | — |
| +44 1403468 | Protected | — |
| +44 1403469 | Protected | — |
| +44 1403470 | Allocated | BT |
| +44 1403471 | Allocated | Sky UK Limited |
| +44 1403472 | Allocated | Voiceflex Limited |
| +44 1403473 | Allocated | Colt Technology Services |
| +44 1403474 | Allocated | KCOM Group Ltd |
| +44 1403475 | Allocated | BT |
| +44 1403476 | Free | — |
| +44 1403477 | Allocated | Bink Networks Ltd |
| +44 1403478 | Free | — |
| +44 1403479 | Free | — |
| +44 140348 | Allocated | Barritel Limited |
| +44 1403490 | Allocated | Resilient Limited |
| +44 1403491 | Allocated | Resilient Limited |
| +44 1403492 | Protected | — |
| +44 1403493 | Protected | — |
| +44 1403494 | Protected | — |
| +44 1403495 | Protected | — |
| +44 1403496 | Protected | — |
| +44 1403497 | Protected | — |
| +44 1403498 | Protected | — |
| +44 1403499 | Allocated | Resilient Limited |
| +44 1403500 | Protected | — |
| +44 1403501 | Protected | — |
| +44 1403502 | Protected | — |
| +44 1403503 | Protected | — |
| +44 1403504 | Protected | — |
| +44 1403505 | Protected | — |
| +44 1403506 | Protected | — |
| +44 1403507 | Protected | — |
| +44 1403508 | Protected | — |
| +44 1403509 | Protected | — |
| +44 140351 | Allocated | TelNG Limited |
| +44 140352 | Protected | — |
| +44 140353 | Protected | — |
| +44 1403540 | Allocated | (AQ) LIMITED |
| +44 1403541 | Allocated | TalkTalk Communications Limited |
| +44 1403542 | Allocated | Digital Space Group Limited |
| +44 1403543 | Allocated | Entanet International Ltd |
| +44 1403544 | Protected | — |
| +44 1403545 | Allocated | Telecoms World Limited |
| +44 1403546 | Allocated | Telecom2 Limited |
| +44 1403547 | Allocated | Gamma Telecom Holdings Limited |
| +44 1403548 | Allocated | Digital Space Group Limited |
| +44 1403549 | Allocated | Invade International Ltd |
| +44 140355 | Allocated | Citrus Telecommunications Ltd |
| +44 1403560 | Allocated | Nodemax Limited |
| +44 1403561 | Protected | — |
| +44 1403562 | Allocated | Solutios Limited |
| +44 1403563 | Allocated | Sky UK Limited |
| +44 1403564 | Allocated | Verizon UK Limited |
| +44 1403565 | Protected | — |
| +44 1403566 | Allocated | Net-Work Internet Ltd |
| +44 1403567 | Quarantined | — |
| +44 1403568 | Quarantined | — |
| +44 1403569 | Allocated | CFL Communications Ltd |
| +44 1403570 | Protected | — |
| +44 1403571 | Protected | — |
| +44 1403572 | Protected | — |
| +44 1403573 | Protected | — |
| +44 1403574 | Protected | — |
| +44 1403575 | Protected | — |
| +44 1403576 | Protected | — |
| +44 1403577 | Allocated | Spitfire Network Services Limited |
| +44 1403578 | Protected | — |
| +44 1403579 | Protected | — |
| +44 1403580 | Allocated | Localphone Limited |
| +44 1403581 | Allocated | TalkTalk Communications Limited |
| +44 1403582 | Allocated | Voxbone SA |
| +44 1403583 | Allocated | Nexus Telecommunications Limited |
| +44 1403584 | Allocated | WightFibre Limited |
| +44 1403585 | Allocated | Nuso Cloud UK Limited |
| +44 1403586 | Allocated | Buzz Networks Limited |
| +44 1403587 | Allocated | Atomstream Limited |
| +44 1403588 | Allocated | TalkTalk Communications Limited |
| +44 1403589 | Protected | — |
| +44 1403590 | Protected | — |
| +44 1403591 | Allocated | Digitech Solutions Global Limited |
| +44 1403592 | Allocated | Suretec Systems Ltd |
| +44 1403593 | Allocated | Calltracks Limited |
| +44 1403594 | Allocated | Core Telecom Limited |
| +44 1403595 | Allocated | VoIP-Un Limited |
Related lookups
- 01293 Crawley11 km away
- 01798 Pulborough17 km away
- 01444 Haywards Heath18 km away
- 01306 Dorking19 km away
- BT26 allocated blocks on 01403
- Vodafone Ltd (C&W)18 allocated blocks on 01403
- Gamma Telecom Holdings Limited8 allocated blocks on 01403
- All UK towns A–ZDialling codes by town
- More West Sussex 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 01403
Where is area code 01403?
01403 is Ofcom's Horsham numbering area, in West Sussex, South East England. Its exchange town is in West Sussex. From abroad, drop the 0 and dial +44 1403.
Do I need to dial 01403 for a local call?
Traditionally not from another 01403 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01403 first always works, and mobiles always need it.
How are 01403 numbers written?
Numbers on 01403 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01403 234 567. From abroad the leading zero is dropped: +44 1403 then the local number.
What was the 01403 area code before?
01403 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 0403. Old signage or stationery showing 0403 refers to the same Horsham numbers.
Which phone companies hold 01403 numbers?
Ofcom lists 98 providers with allocated blocks on 01403. The largest are BT with 26 of the 172 allocated blocks, Vodafone with 18 of the 172 allocated blocks and Gamma Telecom Holdings Limited with 8 of the 172 allocated blocks. Numbers can be ported, so a number's current provider may differ from the block's holder.
Are 01403 numbers reported as scams?
1 caller verdict have been left on 01403 numbers: 0 scam, 0 nuisance and 1 safe.
Which area codes are next to 01403?
By distance between exchange towns, the nearest other codes are 01293 Crawley (11 km), 01798 Pulborough (17 km), 01444 Haywards Heath (18 km) and 01306 Dorking (19 km).
How do I report a scam call from a 01403 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.