UK area code
01903 area code — Worthing
01903 is Ofcom’s Worthing numbering area, in West Sussex, South East England. 103 phone companies hold its 217 allocated number blocks. Visitors have checked 27 different 01903 numbers here. Its numbers are written like 01903 234 567. The nearest other codes are 01273 Brighton (16 km) and 01798 Pulborough (18 km).
01903 at a glance
- Ofcom area name
- Worthing
- County
- West Sussex
- Council area
- West Sussex
- Region
- South East England
- Number format
- 01903 234 567 (4+6)
- Local calls
- Full number recommended
- Current code since
- 1995 (previously 0903)
- Allocated blocks
- 217 of 388 (56%) across 103 providers
- Newest block
- 26 January 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 01903 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.
- Checks
- 32
- Different numbers checked
- 27
- Different people checking
- 28
That makes 01903 numbers the 32nd most-checked of the 443 UK area codes people have looked up here.
If a 01903 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.
01903 history and number format
Number format: Numbers on 01903 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01903 234 567.
Before 1995: 01903 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 0903.
Local dialling: Traditionally not from another 01903 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01903 first always works, and mobiles always need it.
Allocation record: the oldest number block still visible on 01903 was allocated on 15 July 1994, and the most recent on 26 January 2026. 2 blocks were allocated in the last 12 months — newly-activated ranges with no call history, which is worth knowing when an unfamiliar 01903 number rings (see the weekly numbering changelog for every new allocation.)
Phone companies holding 01903 numbers
Every Ofcom range holder with blocks on 01903, 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 | 33 | 33 | 15 July 1994 | 20 March 2024 |
| Gamma Telecom Holdings Limited | 16 | 16 | 13 March 2004 | 27 August 2025 |
| TalkTalk Communications Limited | 12 | 12 | 31 August 2011 | 9 January 2020 |
| Sky UK Limited | 10 | 10 | 27 June 2013 | 10 January 2024 |
| Vodafone Ltd (C&W) | 10 | 10 | 9 September 2013 | 16 November 2021 |
| Colt Technology Services | 7 | 7 | 7 May 2015 | 6 May 2025 |
| Magrathea Telecommunications Limited | 7 | 7 | 17 November 2011 | 17 November 2011 |
| Virgin Media Limited | 6 | 6 | 15 July 1994 | 27 June 2012 |
| GCI Network Solutions Limited | 4 | 4 | 2 May 2017 | 22 December 2023 |
| Orange Business Holdings UK Limited | 4 | 4 | 13 June 2014 | 24 April 2015 |
| Voxbone SA | 4 | 4 | 29 September 2008 | 20 November 2025 |
| DRD Communications Limited | 3 | 3 | 5 October 2023 | 5 October 2023 |
| Digital Space Group Limited | 3 | 3 | 4 June 2008 | 12 April 2016 |
| Lumen Technologies UK Limited | 3 | 3 | 25 July 2011 | 25 July 2011 |
| Calltracks Limited | 2 | 2 | 20 September 2013 | 21 October 2014 |
| Fuse 2 Communications Ltd | 2 | 2 | 3 July 2017 | 22 January 2024 |
| IOVOX Limited | 2 | 2 | 4 July 2012 | 31 January 2017 |
| Media Hawk Ltd | 2 | 2 | 10 April 2013 | 24 April 2023 |
| Resilient Limited | 2 | 2 | 9 September 2011 | 9 September 2011 |
| Six Degrees Technology Group Limited | 2 | 2 | 3 April 2020 | 3 April 2020 |
| (AQ) LIMITED | 1 | 1 | 27 September 2012 | 27 September 2012 |
| 24 Seven Cloud Communications Ltd | 1 | 1 | 27 January 2020 | 27 January 2020 |
| 8x8 Communications UK Limited | 1 | 1 | 19 April 2012 | 19 April 2012 |
| AQL Wholesale Ltd | 1 | 1 | 1 November 2004 | 1 November 2004 |
| Adepteo Limited | 1 | 1 | 29 November 2016 | 29 November 2016 |
| Andrews & Arnold (Numbers) Ltd | 1 | 1 | 9 April 2009 | 9 April 2009 |
| Atomstream Limited | 1 | 1 | 12 April 2010 | 12 April 2010 |
| Barritec Limited | 1 | 1 | 23 September 2011 | 23 September 2011 |
| Barritel Limited | 1 | 1 | 21 June 2007 | 21 June 2007 |
| Belgacom International Carrier Services SA | 1 | 1 | 20 June 2016 | 20 June 2016 |
Showing the 30 largest of 103 holders.
Openreach exchanges at Worthing
Exchanges Openreach lists at this location in its copper stop-sell programme, with the date new copper orders stop.
- Findon SDFNDNStop sell 01-Nov-22 · Tranche 6
- Worthing Central SDWCNTRStop sell 02-Aug-22 · Tranche 5
All number blocks on 01903first 200 of 388, by prefix
| Prefix | Status | Range holder |
|---|---|---|
| +44 190300 | Allocated | Global Reach Networks Limited |
| +44 190301 | Protected | — |
| +44 190302 | Protected | — |
| +44 190303 | Protected | — |
| +44 190304 | Protected | — |
| +44 190305 | Protected | — |
| +44 190306 | Protected | — |
| +44 190307 | Protected | — |
| +44 190308 | Protected | — |
| +44 190309 | Protected | — |
| +44 190310 | Protected | — |
| +44 190311 | Protected | — |
| +44 190312 | Protected | — |
| +44 190313 | Protected | — |
| +44 190314 | Protected | — |
| +44 190315 | Protected | — |
| +44 190316 | Protected | — |
| +44 190317 | Protected | — |
| +44 190318 | Protected | — |
| +44 190319 | Protected | — |
| +44 190320 | Allocated | BT |
| +44 190321 | Allocated | BT |
| +44 190322 | Allocated | BT |
| +44 190323 | Allocated | BT |
| +44 190324 | Allocated | BT |
| +44 190325 | Allocated | Gamma Telecom Holdings Limited |
| +44 190326 | Allocated | BT |
| +44 190327 | Allocated | BT |
| +44 190328 | Allocated | BT |
| +44 1903290 | Allocated | Linear Telecoms Limited |
| +44 1903291 | Allocated | Internexus Networks Limited |
| +44 1903292 | Allocated | Hello Telecom (UK) Limited |
| +44 1903293 | Allocated | Bicom Systems EURL |
| +44 1903294 | Allocated | ICC Networks Ltd |
| +44 1903295 | Protected | — |
| +44 1903296 | Allocated | 8x8 Communications UK Limited |
| +44 1903297 | Allocated | TalkTalk Communications Limited |
| +44 1903298 | Allocated | Ziron Limited |
| +44 1903299 | Allocated | Invoco Ltd |
| +44 190330 | Allocated | TelNG Limited |
| +44 190331 | Allocated | Verizon UK Limited |
| +44 1903320 | Allocated | (AQ) LIMITED |
| +44 1903321 | Allocated | Vodafone Ltd (C&W) |
| +44 1903322 | Allocated | VoIP-Un Limited |
| +44 1903323 | Allocated | Voiceflex Limited |
| +44 1903324 | Allocated | Digital Space Group Limited |
| +44 1903325 | Allocated | Redcentric Solutions Limited |
| +44 1903326 | Allocated | Telecom2 Limited |
| +44 1903327 | Allocated | Digital Space Group Limited |
| +44 1903328 | Allocated | Nodemax Limited |
| +44 1903329 | Allocated | Entanet International Ltd |
| +44 1903330 | Allocated | Localphone Limited |
| +44 1903331 | Allocated | Inet Telecoms Ltd (Voipfone) |
| +44 1903332 | Allocated | Barritel Limited |
| +44 1903333 | Allocated | Net-Work Internet Ltd |
| +44 1903334 | Allocated | GCI Network Solutions Limited |
| +44 1903335 | Allocated | TGL Services (UK) Ltd |
| +44 1903336 | Protected | — |
| +44 1903337 | Allocated | Voxbone SA |
| +44 1903338 | Protected | — |
| +44 1903339 | Allocated | TalkTalk Communications Limited |
| +44 1903340 | Allocated | TalkTalk Communications Limited |
| +44 1903341 | Allocated | Solutios Limited |
| +44 1903342 | Protected | — |
| +44 1903343 | Allocated | Served Up Limited |
| +44 1903344 | Quarantined | — |
| +44 1903345 | Allocated | Mars Communications Limited |
| +44 1903346 | Allocated | Invade International Ltd |
| +44 1903347 | Quarantined | — |
| +44 1903348 | Allocated | Andrews & Arnold (Numbers) Ltd |
| +44 1903349 | Allocated | CFL Communications Ltd |
| +44 1903350 | Allocated | Telecoms World Limited |
| +44 1903351 | Protected | — |
| +44 1903352 | Allocated | Nexus Telecommunications Limited |
| +44 1903353 | Protected | — |
| +44 1903354 | Protected | — |
| +44 1903355 | Allocated | Nuso Cloud UK Limited |
| +44 1903356 | Allocated | TeleWare Group Limited |
| +44 1903357 | Allocated | Buzz Networks Limited |
| +44 1903358 | Allocated | Atomstream Limited |
| +44 1903359 | Protected | — |
| +44 1903360 | Protected | — |
| +44 1903361 | Protected | — |
| +44 1903362 | Protected | — |
| +44 1903363 | Protected | — |
| +44 1903364 | Protected | — |
| +44 1903365 | Protected | — |
| +44 1903366 | Allocated | TalkTalk Communications Limited |
| +44 1903367 | Allocated | TalkTalk Communications Limited |
| +44 1903368 | Allocated | TalkTalk Communications Limited |
| +44 1903369 | Allocated | TalkTalk Communications Limited |
| +44 1903370 | Allocated | Suretec Systems Ltd |
| +44 1903371 | Allocated | Calltracks Limited |
| +44 1903372 | Allocated | Simwood eSMS Limited |
| +44 1903373 | Allocated | Windsor Telecom Limited |
| +44 1903374 | Allocated | Core Telecom Limited |
| +44 1903375 | Allocated | Telephone Box Limited |
| +44 1903376 | Protected | — |
| +44 1903377 | Allocated | Datazero Ltd |
| +44 1903378 | Allocated | Phone Co-Op Numbering Limited |
| +44 1903379 | Protected | — |
| +44 1903380 | Allocated | Invosys Limited |
| +44 1903381 | Allocated | Belgacom International Carrier Services SA |
| +44 1903382 | Allocated | Voxbone SA |
| +44 1903383 | Allocated | Calltracks Limited |
| +44 1903384 | Allocated | Adepteo Limited |
| +44 1903385 | Allocated | Gamma Telecom Holdings Limited |
| +44 1903386 | Allocated | Sky UK Limited |
| +44 1903387 | Free | — |
| +44 1903388 | Allocated | Digital Mail Limited |
| +44 1903389 | Allocated | Nationwide Telephone Assistance Ltd |
| +44 1903390 | Allocated | Resilient Limited |
| +44 1903391 | Protected | — |
| +44 1903392 | Protected | — |
| +44 1903393 | Protected | — |
| +44 1903394 | Protected | — |
| +44 1903395 | Protected | — |
| +44 1903396 | Protected | — |
| +44 1903397 | Protected | — |
| +44 1903398 | Protected | — |
| +44 1903399 | Allocated | Resilient Limited |
| +44 190340 | Protected | — |
| +44 190341 | Allocated | Sky UK Limited |
| +44 1903420 | Protected | — |
| +44 1903421 | Protected | — |
| +44 1903422 | Protected | — |
| +44 1903423 | Allocated | Digital Space Group Limited |
| +44 1903424 | Protected | — |
| +44 1903425 | Protected | — |
| +44 1903426 | Protected | — |
| +44 1903427 | Protected | — |
| +44 1903428 | Protected | — |
| +44 1903429 | Protected | — |
| +44 190343 | Allocated | Flextel Limited |
| +44 1903440 | Protected | — |
| +44 1903441 | Allocated | Media Hawk Ltd |
| +44 1903442 | Allocated | Kalnet4U Ltd |
| +44 1903443 | Allocated | Redwood Technologies Ltd |
| +44 1903444 | Allocated | GCI Network Solutions Limited |
| +44 1903445 | Allocated | Fuse 2 Communications Ltd |
| +44 1903446 | Allocated | TalkTalk Communications Limited |
| +44 1903447 | Allocated | Orange Business Holdings UK Limited |
| +44 1903448 | Allocated | Orange Business Holdings UK Limited |
| +44 1903449 | Allocated | XoverX Ltd |
| +44 190345 | Protected | — |
| +44 1903460 | Protected | — |
| +44 1903461 | Protected | — |
| +44 1903462 | Protected | — |
| +44 1903463 | Protected | — |
| +44 1903464 | Protected | — |
| +44 1903465 | Protected | — |
| +44 1903466 | Protected | — |
| +44 1903467 | Protected | — |
| +44 1903468 | Protected | — |
| +44 1903469 | Protected | — |
| +44 1903470 | Protected | — |
| +44 1903471 | Protected | — |
| +44 1903472 | Protected | — |
| +44 1903473 | Protected | — |
| +44 1903474 | Protected | — |
| +44 1903475 | Protected | — |
| +44 1903476 | Protected | — |
| +44 1903477 | Allocated | Spitfire Network Services Limited |
| +44 1903478 | Protected | — |
| +44 1903479 | Protected | — |
| +44 1903480 | Protected | — |
| +44 1903481 | Protected | — |
| +44 1903482 | Protected | — |
| +44 1903483 | Protected | — |
| +44 1903484 | Protected | — |
| +44 1903485 | Protected | — |
| +44 1903486 | Protected | — |
| +44 1903487 | Protected | — |
| +44 1903488 | Protected | — |
| +44 1903489 | Protected | — |
| +44 1903490 | Allocated | VoiceHost Limited |
| +44 1903491 | Allocated | INTELLIGENT EXCHANGES LIMITED |
| +44 1903492 | Allocated | Sky UK Limited |
| +44 1903493 | Allocated | Voxbone SA |
| +44 1903494 | Allocated | Lanonyx Telecom Limited |
| +44 1903495 | Allocated | BT |
| +44 1903496 | Allocated | Gamma Telecom Holdings Limited |
| +44 1903497 | Allocated | Gamma Telecom Holdings Limited |
| +44 1903498 | Allocated | Sky UK Limited |
| +44 1903499 | Allocated | KCOM Group Ltd |
| +44 190350 | Allocated | BT |
| +44 190351 | Protected | — |
| +44 190352 | Allocated | Virgin Media Limited |
| +44 190353 | Allocated | Virgin Media Limited |
| +44 190354 | Allocated | BT |
| +44 190355 | Allocated | GCI Network Solutions Limited |
| +44 190356 | Allocated | Vodafone Ltd (C&W) |
| +44 190357 | Allocated | Vodafone Ltd (C&W) |
| +44 1903580 | Protected | — |
| +44 1903581 | Protected | — |
| +44 1903582 | Protected | — |
| +44 1903583 | Protected | — |
| +44 1903584 | Protected | — |
| +44 1903585 | Protected | — |
| +44 1903586 | Protected | — |
Related lookups
- 01273 Brighton16 km away
- 01798 Pulborough18 km away
- 01403 Horsham28 km away
- 01444 Haywards Heath28 km away
- BT33 allocated blocks on 01903
- Gamma Telecom Holdings Limited16 allocated blocks on 01903
- TalkTalk Communications Limited12 allocated blocks on 01903
- 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 01903
Where is area code 01903?
01903 is Ofcom's Worthing numbering area, in West Sussex, South East England. Its exchange town is in West Sussex. From abroad, drop the 0 and dial +44 1903.
Do I need to dial 01903 for a local call?
Traditionally not from another 01903 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01903 first always works, and mobiles always need it.
How are 01903 numbers written?
Numbers on 01903 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01903 234 567. From abroad the leading zero is dropped: +44 1903 then the local number.
What was the 01903 area code before?
01903 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 0903. Old signage or stationery showing 0903 refers to the same Worthing numbers.
Which phone companies hold 01903 numbers?
Ofcom lists 103 providers with allocated blocks on 01903. The largest are BT with 33 of the 217 allocated blocks, Gamma Telecom Holdings Limited with 16 of the 217 allocated blocks and TalkTalk Communications Limited with 12 of the 217 allocated blocks. Numbers can be ported, so a number's current provider may differ from the block's holder.
Are 01903 numbers reported as scams?
Visitors have checked 27 different 01903 numbers here 32 times since May 2026.
Which area codes are next to 01903?
By distance between exchange towns, the nearest other codes are 01273 Brighton (16 km), 01798 Pulborough (18 km), 01403 Horsham (28 km) and 01444 Haywards Heath (28 km).
How do I report a scam call from a 01903 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.