UK area code
01435 area code — Heathfield
01435 is Ofcom’s Heathfield numbering area, in East Sussex, South East England. 84 phone companies hold its 104 allocated number blocks. Its numbers are written like 01435 234 567. The nearest other codes are 01825 Uckfield (11 km) and 01323 Eastbourne (20 km).
01435 at a glance
- Ofcom area name
- Heathfield
- County
- East Sussex
- Council area
- East Sussex
- Region
- South East England
- Number format
- 01435 234 567 (4+6)
- Local calls
- Full number recommended
- Current code since
- 1995 (previously 0435)
- Allocated blocks
- 104 of 424 (25%) across 84 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 01435 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.
01435 history and number format
Number format: Numbers on 01435 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01435 234 567.
Before 1995: 01435 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 0435.
Local dialling: Traditionally not from another 01435 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01435 first always works, and mobiles always need it.
Allocation record: the oldest number block still visible on 01435 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 01435 number rings (see the weekly numbering changelog for every new allocation.)
Phone companies holding 01435 numbers
Every Ofcom range holder with blocks on 01435, 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 | 7 | 7 | 15 July 1994 | 7 May 2020 |
| Gamma Telecom Holdings Limited | 7 | 7 | 7 February 2013 | 7 February 2013 |
| Inet Telecoms Ltd (Voipfone) | 3 | 3 | 30 November 2009 | 30 November 2009 |
| TalkTalk Communications Limited | 3 | 3 | 19 January 2012 | 13 February 2013 |
| Digital Space Group Limited | 2 | 2 | 30 November 2007 | 15 March 2016 |
| Fuse 2 Communications Ltd | 2 | 2 | 4 July 2017 | 22 January 2024 |
| GCI Network Solutions Limited | 2 | 2 | 25 April 2017 | 22 December 2023 |
| Sky UK Limited | 2 | 2 | 2 July 2013 | 10 January 2024 |
| (AQ) LIMITED | 1 | 1 | 11 September 2012 | 11 September 2012 |
| 24 Seven Cloud Communications Ltd | 1 | 1 | 17 January 2020 | 17 January 2020 |
| 8x8 Communications UK Limited | 1 | 1 | 29 March 2012 | 29 March 2012 |
| AQL Wholesale Ltd | 1 | 1 | 26 June 2006 | 26 June 2006 |
| Adepteo Limited | 1 | 1 | 17 January 2017 | 17 January 2017 |
| Andrews & Arnold (Numbers) Ltd | 1 | 1 | 6 March 2009 | 6 March 2009 |
| Atomstream Limited | 1 | 1 | 23 April 2010 | 23 April 2010 |
| Barritel Limited | 1 | 1 | 7 June 2007 | 7 June 2007 |
| Bicom Systems EURL | 1 | 1 | 2 March 2012 | 2 March 2012 |
| Bink Networks Ltd | 1 | 1 | 3 April 2023 | 3 April 2023 |
| CFL Communications Ltd | 1 | 1 | 10 July 2009 | 10 July 2009 |
| Calltracks Limited | 1 | 1 | 20 September 2013 | 20 September 2013 |
| Colt Technology Services | 1 | 1 | 20 June 2016 | 20 June 2016 |
| Content Guru Limited | 1 | 1 | 15 October 2012 | 15 October 2012 |
| DIDWW Ireland Limited | 1 | 1 | 27 January 2020 | 27 January 2020 |
| Dial 9 Communications Limited | 1 | 1 | 10 December 2019 | 10 December 2019 |
| Digitech Solutions Global Limited | 1 | 1 | 28 April 2010 | 28 April 2010 |
| EVE CONNECT LTD | 1 | 1 | 15 June 2022 | 15 June 2022 |
| Flextel Limited | 1 | 1 | 2 December 2005 | 2 December 2005 |
| Hello Telecom (UK) Limited | 1 | 1 | 20 July 2012 | 20 July 2012 |
| I.T Communications Limited | 1 | 1 | 19 April 2016 | 19 April 2016 |
| ICC Networks Ltd | 1 | 1 | 13 April 2012 | 13 April 2012 |
Showing the 30 largest of 84 holders.
All number blocks on 01435first 200 of 424, by prefix
| Prefix | Status | Range holder |
|---|---|---|
| +44 143500 | Protected | — |
| +44 143501 | Protected | — |
| +44 143502 | Protected | — |
| +44 143503 | Protected | — |
| +44 143504 | Protected | — |
| +44 143505 | Protected | — |
| +44 143506 | Protected | — |
| +44 143507 | Protected | — |
| +44 143508 | Protected | — |
| +44 143509 | Protected | — |
| +44 143510 | Protected | — |
| +44 143511 | Protected | — |
| +44 143512 | Protected | — |
| +44 143513 | Protected | — |
| +44 143514 | Protected | — |
| +44 143515 | Protected | — |
| +44 143516 | Protected | — |
| +44 143517 | Protected | — |
| +44 143518 | Protected | — |
| +44 143519 | Protected | — |
| +44 143520 | Allocated | AQL Wholesale Ltd |
| +44 1435210 | Protected | — |
| +44 1435211 | Protected | — |
| +44 1435212 | Protected | — |
| +44 1435213 | Protected | — |
| +44 1435214 | Protected | — |
| +44 1435215 | Protected | — |
| +44 1435216 | Protected | — |
| +44 1435217 | Protected | — |
| +44 1435218 | Protected | — |
| +44 1435219 | Protected | — |
| +44 143522 | Allocated | TTNC Limited |
| +44 143523 | Allocated | TelNG Limited |
| +44 143524 | Allocated | Localphone Limited |
| +44 143525 | Protected | — |
| +44 143526 | Allocated | Barritel Limited |
| +44 1435270 | Protected | — |
| +44 1435271 | Protected | — |
| +44 1435272 | Protected | — |
| +44 1435273 | Protected | — |
| +44 1435274 | Protected | — |
| +44 1435275 | Protected | — |
| +44 1435276 | Protected | — |
| +44 1435277 | Allocated | Spitfire Network Services Limited |
| +44 1435278 | Protected | — |
| +44 1435279 | Protected | — |
| +44 143528 | Allocated | Redcentric Solutions Limited |
| +44 143529 | Protected | — |
| +44 143530 | Allocated | (AQ) LIMITED |
| +44 143531 | Allocated | Nationwide Telephone Assistance Ltd |
| +44 143532 | Allocated | Digital Space Group Limited |
| +44 143533 | Allocated | Net-Work Internet Ltd |
| +44 143534 | Allocated | VoIP-Un Limited |
| +44 143535 | Allocated | Nodemax Limited |
| +44 143536 | Allocated | Telecom2 Limited |
| +44 143537 | Protected | — |
| +44 1435380 | Allocated | Voxbone SA |
| +44 1435381 | Protected | — |
| +44 1435382 | Protected | — |
| +44 1435383 | Protected | — |
| +44 1435384 | Protected | — |
| +44 1435385 | Protected | — |
| +44 1435386 | Protected | — |
| +44 1435387 | Protected | — |
| +44 1435388 | Protected | — |
| +44 1435389 | Protected | — |
| +44 1435390 | Protected | — |
| +44 1435391 | Protected | — |
| +44 1435392 | Protected | — |
| +44 1435393 | Protected | — |
| +44 1435394 | Protected | — |
| +44 1435395 | Protected | — |
| +44 1435396 | Protected | — |
| +44 1435397 | Allocated | Digital Space Group Limited |
| +44 1435398 | Protected | — |
| +44 1435399 | Protected | — |
| +44 1435400 | Protected | — |
| +44 1435401 | Protected | — |
| +44 1435402 | Protected | — |
| +44 1435403 | Protected | — |
| +44 1435404 | Protected | — |
| +44 1435405 | Protected | — |
| +44 1435406 | Protected | — |
| +44 1435407 | Protected | — |
| +44 1435408 | Allocated | TalkTalk Communications Limited |
| +44 1435409 | Allocated | TalkTalk Communications Limited |
| +44 143541 | Allocated | Voiceflex Limited |
| +44 143542 | Allocated | BT |
| +44 143543 | Protected | — |
| +44 143544 | Allocated | Solutios Limited |
| +44 143545 | Quarantined | — |
| +44 143546 | Protected | — |
| +44 143547 | Allocated | Mars Communications Limited |
| +44 143548 | Allocated | Andrews & Arnold (Numbers) Ltd |
| +44 143549 | Allocated | Telecoms World Limited |
| +44 1435500 | Allocated | Linear Telecoms Limited |
| +44 1435501 | Allocated | TalkTalk Communications Limited |
| +44 1435502 | Allocated | Orbtalk Limited |
| +44 1435503 | Protected | — |
| +44 1435504 | Allocated | Invoco Ltd |
| +44 1435505 | Protected | — |
| +44 1435506 | Allocated | Internexus Networks Limited |
| +44 1435507 | Allocated | Bicom Systems EURL |
| +44 1435508 | Allocated | Simwood eSMS Limited |
| +44 1435509 | Protected | — |
| +44 1435510 | Allocated | Gamma Telecom Holdings Limited |
| +44 1435511 | Allocated | Gamma Telecom Holdings Limited |
| +44 1435512 | Allocated | Gamma Telecom Holdings Limited |
| +44 1435513 | Protected | — |
| +44 1435514 | Protected | — |
| +44 1435515 | Allocated | Gamma Telecom Holdings Limited |
| +44 1435516 | Allocated | Gamma Telecom Holdings Limited |
| +44 1435517 | Allocated | Gamma Telecom Holdings Limited |
| +44 1435518 | Allocated | Gamma Telecom Holdings Limited |
| +44 1435519 | Protected | — |
| +44 143552 | Protected | — |
| +44 1435530 | Protected | — |
| +44 1435531 | Protected | — |
| +44 1435532 | Protected | — |
| +44 1435533 | Protected | — |
| +44 1435534 | Protected | — |
| +44 1435535 | Protected | — |
| +44 1435536 | Protected | — |
| +44 1435537 | Protected | — |
| +44 1435538 | Protected | — |
| +44 1435539 | Protected | — |
| +44 143554 | Allocated | Flextel Limited |
| +44 1435550 | Protected | — |
| +44 1435551 | Protected | — |
| +44 1435552 | Protected | — |
| +44 1435553 | Protected | — |
| +44 1435554 | Allocated | Six Degrees Technology Group Limited |
| +44 1435555 | Protected | — |
| +44 1435556 | Protected | — |
| +44 1435557 | Protected | — |
| +44 1435558 | Protected | — |
| +44 1435559 | Protected | — |
| +44 143556 | Protected | — |
| +44 1435570 | Allocated | YayYay Limited |
| +44 1435571 | Allocated | Invosys Limited |
| +44 1435572 | Allocated | Nexbridge Communications Limited |
| +44 1435573 | Allocated | INTELLIGENT EXCHANGES LIMITED |
| +44 1435574 | Allocated | 8x8 Communications UK Limited |
| +44 1435575 | Allocated | ICC Networks Ltd |
| +44 1435576 | Allocated | Ziron Limited |
| +44 1435577 | Allocated | IOVOX Limited |
| +44 1435578 | Allocated | Hello Telecom (UK) Limited |
| +44 1435579 | Protected | — |
| +44 1435580 | Allocated | Phone Co-Op Numbering Limited |
| +44 1435581 | Protected | — |
| +44 1435582 | Allocated | Media Hawk Ltd |
| +44 1435583 | Allocated | Kalnet4U Ltd |
| +44 1435584 | Allocated | Fuse 2 Communications Ltd |
| +44 1435585 | Allocated | Content Guru Limited |
| +44 1435586 | Allocated | Nuso Cloud UK Limited |
| +44 1435587 | Allocated | M247 Ltd |
| +44 1435588 | Allocated | Minotaur Telecom Limited |
| +44 1435589 | Allocated | XoverX Ltd |
| +44 1435590 | Protected | — |
| +44 1435591 | Protected | — |
| +44 1435592 | Protected | — |
| +44 1435593 | Protected | — |
| +44 1435594 | Protected | — |
| +44 1435595 | Protected | — |
| +44 1435596 | Protected | — |
| +44 1435597 | Protected | — |
| +44 1435598 | Protected | — |
| +44 1435599 | Protected | — |
| +44 143560 | Allocated | Vodafone Ltd (C&W) |
| +44 143561 | Allocated | Invade International Ltd |
| +44 143562 | Allocated | Nexus Telecommunications Limited |
| +44 143563 | Quarantined | — |
| +44 143564 | Allocated | CFL Communications Ltd |
| +44 143565 | Protected | — |
| +44 1435660 | Allocated | Digitech Solutions Global Limited |
| +44 1435661 | Allocated | Sky UK Limited |
| +44 1435662 | Allocated | Calltracks Limited |
| +44 1435663 | Allocated | Suretec Systems Ltd |
| +44 1435664 | Allocated | VoiceHost Limited |
| +44 1435665 | Allocated | Windsor Telecom Limited |
| +44 1435666 | Allocated | Atomstream Limited |
| +44 1435667 | Allocated | GCI Network Solutions Limited |
| +44 1435668 | Allocated | Telephone Box Limited |
| +44 1435669 | Protected | — |
| +44 1435670 | Allocated | Inet Telecoms Ltd (Voipfone) |
| +44 1435671 | Allocated | Inet Telecoms Ltd (Voipfone) |
| +44 1435672 | Protected | — |
| +44 1435673 | Protected | — |
| +44 1435674 | Protected | — |
| +44 1435675 | Protected | — |
| +44 1435676 | Protected | — |
| +44 1435677 | Allocated | Inet Telecoms Ltd (Voipfone) |
| +44 1435678 | Protected | — |
| +44 1435679 | Protected | — |
| +44 1435680 | Protected | — |
| +44 1435681 | Protected | — |
| +44 1435682 | Allocated | Mintaka Limited |
| +44 1435683 | Allocated | Virgin Media Limited |
| +44 1435684 | Allocated | 24 Seven Cloud Communications Ltd |
| +44 1435685 | Allocated | Colt Technology Services |
Related lookups
- 01825 Uckfield11 km away
- 01323 Eastbourne20 km away
- 01892 Tunbridge Wells21 km away
- 01580 Cranbrook24 km away
- BT7 allocated blocks on 01435
- Gamma Telecom Holdings Limited7 allocated blocks on 01435
- Inet Telecoms Ltd (Voipfone)3 allocated blocks on 01435
- All UK towns A–ZDialling codes by town
- More East 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 01435
Where is area code 01435?
01435 is Ofcom's Heathfield numbering area, in East Sussex, South East England. Its exchange town is in East Sussex. From abroad, drop the 0 and dial +44 1435.
Do I need to dial 01435 for a local call?
Traditionally not from another 01435 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01435 first always works, and mobiles always need it.
How are 01435 numbers written?
Numbers on 01435 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01435 234 567. From abroad the leading zero is dropped: +44 1435 then the local number.
What was the 01435 area code before?
01435 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 0435. Old signage or stationery showing 0435 refers to the same Heathfield numbers.
Which phone companies hold 01435 numbers?
Ofcom lists 84 providers with allocated blocks on 01435. The largest are BT with 7 of the 104 allocated blocks, Gamma Telecom Holdings Limited with 7 of the 104 allocated blocks and Inet Telecoms Ltd (Voipfone) with 3 of the 104 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 01435?
By distance between exchange towns, the nearest other codes are 01825 Uckfield (11 km), 01323 Eastbourne (20 km), 01892 Tunbridge Wells (21 km) and 01580 Cranbrook (24 km).
How do I report a scam call from a 01435 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.