UK area code

01865 area code — Oxford

01865 is Ofcom’s Oxford numbering area, in Oxfordshire, South East England. 95 phone companies hold its 400 allocated number blocks. Visitors have checked 29 different 01865 numbers here. Its numbers are written like 01865 234 567. The nearest other codes are 01235 Abingdon (14 km) and 01869 Bicester (14 km).

01865 at a glance

Ofcom area name: Oxford
County: Oxfordshire
Council area: Oxfordshire
Region: South East England
Number format: 01865 234 567 (4+6)
Local calls: Full number recommended
Current code since: 1995 (previously 0865)
Allocated blocks: 400 of 505 (79%) across 95 providers
Newest block: 10 July 2026 (4 in the last 12 months)
Nearest codes: 01235 Abingdon (14 km), 01869 Bicester (14 km), 01993 Witney (15 km), 01844 Thame (22 km)

Sources: Ofcom numbering data (weekly) and area-code list, Ofcom Numbering Plan, ONS geography.

Map of the 01865 Oxford dialling area and the nearest other UK area codes — Shaded: the council area containing the code's main exchange town (Oxfordshire). Ofcom doesn’t publish exchange boundaries, so this shows where the numbering area’s town is, not an exact outline. Boundaries: ONS (OGL); places: ONS Index of Place Names.

What people check and report about 01865 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: 31
Different numbers checked: 29
Different people checking: 29

That makes 01865 numbers the 33rd most-checked of the 443 UK area codes people have looked up here.

If a 01865 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.
Ofcom: what to do about a scam call ↗
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.
Telephone Preference Service ↗
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.
159 (Stop Scams UK) ↗Report Fraud ↗

01865 history and number format

Number format: Numbers on 01865 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01865 234 567.

Before 1995: 01865 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 0865.

Local dialling: Traditionally not from another 01865 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01865 first always works, and mobiles always need it.

Allocation record: the oldest number block still visible on 01865 was allocated on 15 July 1994, and the most recent on 10 July 2026. 4 blocks were allocated in the last 12 months — newly-activated ranges with no call history, which is worth knowing when an unfamiliar 01865 number rings (see the weekly numbering changelog for every new allocation.)

Phone companies holding 01865 numbers

Every Ofcom range holder with blocks on 01865, 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	154	154	15 July 1994	11 January 2024
Gamma Telecom Holdings Limited	44	44	5 April 2004	26 June 2026
Vodafone Ltd (C&W)	18	18	18 June 2013	12 November 2021
Colt Technology Services	17	17	11 May 2006	10 July 2026
Sky UK Limited	13	13	26 June 2013	30 September 2022
GTT-EMEA LTD	10	10	13 October 2021	13 October 2021
Virgin Media Limited	10	10	27 February 1997	9 June 2006
TalkTalk Communications Limited	9	9	19 June 2006	5 October 2018
GCI Network Solutions Limited	8	8	2 May 2017	22 December 2023
Magrathea Telecommunications Limited	8	8	16 November 2011	16 November 2011
Verizon UK Limited	5	5	24 November 2004	24 November 2004
Media Hawk Ltd	4	4	26 September 2011	13 July 2020
Voxbone SA	4	4	23 November 2007	29 January 2025
DRD Communications Limited	3	3	5 October 2023	5 October 2023
Daisy Communications Ltd	3	3	14 December 2011	14 December 2011
Served Up Limited	3	3	1 March 2013	1 March 2013
Connect Telecom UK Limited	2	2	19 July 2011	19 July 2011
Datazero Ltd	2	2	30 August 2012	12 April 2019
Digital Space Group Limited	2	2	15 March 2016	12 April 2016
IOVOX Limited	2	2	21 August 2013	18 November 2024
Lumen Technologies UK Limited	2	2	6 April 2006	10 April 2007
Redcentric Solutions Limited	2	2	5 June 2015	5 June 2015
Twilio Ireland Limited	2	2	13 October 2020	19 August 2024
Voiceflex Limited	2	2	30 July 2007	18 June 2021
(AQ) LIMITED	1	1	24 April 2013	24 April 2013
24 Seven Cloud Communications Ltd	1	1	21 January 2020	21 January 2020
8x8 Communications UK Limited	1	1	18 April 2012	18 April 2012
AQL Wholesale Ltd	1	1	1 November 2004	1 November 2004
Andrews & Arnold (Numbers) Ltd	1	1	2 April 2009	2 April 2009
BT OnePhone Limited	1	1	6 May 2015	6 May 2015

Showing the 30 largest of 95 holders.

All number blocks on 01865first 200 of 505, by prefix

Prefix	Status	Range holder
+44 186500	Protected	—
+44 186501	Protected	—
+44 186502	Protected	—
+44 186503	Protected	—
+44 186504	Protected	—
+44 186505	Protected	—
+44 186506	Protected	—
+44 186507	Protected	—
+44 186508	Protected	—
+44 186509	Protected	—
+44 1865100	Protected	—
+44 1865101	Protected	—
+44 1865102	Protected	—
+44 1865103	Protected	—
+44 1865104	Protected	—
+44 1865105	Protected	—
+44 1865106	Protected	—
+44 1865107	Protected	—
+44 1865108	Protected	—
+44 1865109	Protected	—
+44 186511	Allocated	ICUK Computing Services Limited
+44 186512	Protected	—
+44 186513	Protected	—
+44 186514	Protected	—
+44 186515	Protected	—
+44 186516	Protected	—
+44 186517	Protected	—
+44 186518	Protected	—
+44 186519	Allocated	Virgin Media Limited
+44 186520	Allocated	BT
+44 186521	Protected	—
+44 1865220	Allocated	BT
+44 1865221	Allocated	BT
+44 1865222	Allocated	BT
+44 1865223	Allocated	BT
+44 1865224	Allocated	GCI Network Solutions Limited
+44 1865225	Allocated	BT
+44 1865226	Allocated	BT
+44 1865227	Allocated	BT
+44 1865228	Allocated	BT
+44 1865229	Allocated	BT
+44 1865230	Allocated	Digital Space Group Limited
+44 1865231	Allocated	Virgin Media Limited
+44 1865232	Allocated	Voicetec Systems Ltd
+44 1865233	Allocated	Lumen Technologies UK Limited
+44 1865234	Allocated	Virgin Media Limited
+44 1865235	Allocated	Virgin Media Limited
+44 1865236	Allocated	TalkTalk Communications Limited
+44 1865237	Allocated	Spitfire Network Services Limited
+44 1865238	Allocated	Kalnet4U Ltd
+44 1865239	Allocated	Resilient Limited
+44 186524	Allocated	BT
+44 1865250	Allocated	BT
+44 1865251	Allocated	BT
+44 1865252	Allocated	BT
+44 1865253	Allocated	BT
+44 1865254	Allocated	BT
+44 1865255	Allocated	BT
+44 1865256	Allocated	BT
+44 1865257	Allocated	Colt Technology Services
+44 1865258	Allocated	BT
+44 1865259	Allocated	EVE CONNECT LTD
+44 186526	Allocated	BT
+44 186527	Allocated	Gamma Telecom Holdings Limited
+44 186528	Allocated	Gamma Telecom Holdings Limited
+44 1865290	Allocated	BT
+44 1865291	Allocated	BT
+44 1865292	Allocated	BT
+44 1865293	Allocated	BT
+44 1865294	Allocated	BT
+44 1865295	Allocated	BT
+44 1865296	Allocated	BT
+44 1865297	Allocated	BT
+44 1865298	Free	—
+44 1865299	Allocated	Hyperoptic Ltd
+44 1865300	Allocated	BT
+44 1865301	Allocated	BT
+44 1865302	Allocated	BT
+44 1865303	Allocated	BT
+44 1865304	Allocated	BT
+44 1865305	Allocated	BT
+44 1865306	Allocated	BT
+44 1865307	Allocated	BT
+44 1865308	Allocated	BT
+44 1865309	Allocated	BT
+44 1865310	Allocated	BT
+44 1865311	Allocated	BT
+44 1865312	Allocated	BT
+44 1865313	Allocated	BT
+44 1865314	Allocated	BT
+44 1865315	Allocated	BT
+44 1865316	Allocated	BT
+44 1865317	Allocated	TalkTalk Communications Limited
+44 1865318	Allocated	BT
+44 1865319	Allocated	BT
+44 186532	Allocated	BT
+44 186533	Allocated	BT
+44 1865340	Allocated	BT
+44 1865341	Allocated	BT
+44 1865342	Allocated	BT
+44 1865343	Allocated	BT
+44 1865344	Allocated	BT
+44 1865345	Allocated	BT
+44 1865346	Allocated	Public Internet Limited
+44 1865347	Allocated	BT
+44 1865348	Allocated	24 Seven Cloud Communications Ltd
+44 1865349	Allocated	BT
+44 186535	Allocated	BT
+44 186536	Allocated	BT
+44 186537	Allocated	BT
+44 186538	Allocated	Vodafone Ltd (C&W)
+44 186539	Allocated	BT
+44 186540	Allocated	BT
+44 1865410	Allocated	Gamma Telecom Holdings Limited
+44 1865411	Allocated	Gamma Telecom Holdings Limited
+44 1865412	Allocated	Lumen Technologies UK Limited
+44 1865413	Allocated	Localphone Limited
+44 1865414	Allocated	TelNG Limited
+44 1865415	Allocated	Voiceflex Limited
+44 1865416	Allocated	BT
+44 1865417	Allocated	(AQ) LIMITED
+44 1865418	Allocated	Net-Work Internet Ltd
+44 1865419	Allocated	Gamma Telecom Holdings Limited
+44 186542	Allocated	Virgin Media Limited
+44 186543	Allocated	Virgin Media Limited
+44 186544	Allocated	BT
+44 186545	Allocated	Virgin Media Limited
+44 186546	Allocated	Virgin Media Limited
+44 186547	Allocated	Vodafone Ltd (C&W)
+44 186548	Allocated	Vodafone Ltd (C&W)
+44 186549	Allocated	Virgin Media Limited
+44 1865500	Allocated	Vodafone Ltd (C&W)
+44 1865501	Allocated	Vodafone Ltd (C&W)
+44 1865502	Allocated	Colt Technology Services
+44 1865503	Allocated	Belgacom International Carrier Services SA
+44 1865504	Allocated	Colt Technology Services
+44 1865505	Allocated	KCOM Group Ltd
+44 1865506	Allocated	SiPalto Ltd
+44 1865507	Allocated	BT
+44 1865508	Allocated	Odigo
+44 1865509	Allocated	Gamma Telecom Holdings Limited
+44 1865510	Allocated	BT
+44 1865511	Allocated	BT
+44 1865512	Allocated	BT
+44 1865513	Allocated	BT
+44 1865514	Allocated	BT
+44 1865515	Allocated	BT
+44 1865516	Allocated	BT
+44 1865517	Allocated	BT
+44 1865518	Allocated	BT
+44 1865519	Allocated	Voxbone SA
+44 1865520	Allocated	VoIP-Un Limited
+44 1865521	Allocated	Voxbone SA
+44 1865522	Allocated	Vodafone Ltd (C&W)
+44 1865523	Allocated	Sky UK Limited
+44 1865524	Allocated	Digital Space Group Limited
+44 1865525	Allocated	TelXL Limited
+44 1865526	Allocated	Telecom2 Limited
+44 1865527	Allocated	Nodemax Limited
+44 1865528	Allocated	Colt Technology Services
+44 1865529	Allocated	BT OnePhone Limited
+44 1865530	Allocated	TELNYX UK LIMITED
+44 1865531	Allocated	Daisy Communications Ltd
+44 1865532	Allocated	Daisy Communications Ltd
+44 1865533	Allocated	Daisy Communications Ltd
+44 1865534	Allocated	Colt Technology Services
+44 1865535	Allocated	Colt Technology Services
+44 1865536	Allocated	Colt Technology Services
+44 1865537	Allocated	Twilio Ireland Limited
+44 1865538	Allocated	Colt Technology Services
+44 1865539	Allocated	Voxbone SA
+44 1865540	Allocated	Vodafone Ltd (C&W)
+44 1865541	Allocated	BT
+44 1865542	Allocated	BT
+44 1865543	Allocated	Vodafone Ltd (C&W)
+44 1865544	Allocated	Calltracks Limited
+44 1865545	Allocated	Number Services Ltd.
+44 1865546	Allocated	BT
+44 1865547	Allocated	SONA BUSINESS PVT. LTD.
+44 1865548	Allocated	BT
+44 1865549	Allocated	Entanet International Ltd
+44 186555	Allocated	BT
+44 1865560	Allocated	Gamma Telecom Holdings Limited
+44 1865561	Allocated	Gamma Telecom Holdings Limited
+44 1865562	Allocated	Gamma Telecom Holdings Limited
+44 1865563	Allocated	Colt Technology Services
+44 1865564	Allocated	GCI Network Solutions Limited
+44 1865565	Allocated	GCI Network Solutions Limited
+44 1865566	Allocated	GCI Network Solutions Limited
+44 1865567	Allocated	GCI Network Solutions Limited
+44 1865568	Allocated	Gamma Telecom Holdings Limited
+44 1865569	Allocated	Colt Technology Services
+44 1865570	Allocated	Simwood eSMS Limited
+44 1865571	Allocated	Orange Business Holdings UK Limited
+44 1865572	Allocated	Virgin Media Limited
+44 1865573	Allocated	Commi Holdings Limited
+44 1865574	Free	—
+44 1865575	Allocated	TTNC Limited
+44 1865576	Allocated	Sky UK Limited
+44 1865577	Allocated	Vodafone Ltd (C&W)

FAQs about 01865

Where is area code 01865?

01865 is Ofcom's Oxford numbering area, in Oxfordshire, South East England. Its exchange town is in Oxfordshire. From abroad, drop the 0 and dial +44 1865.

Do I need to dial 01865 for a local call?

Traditionally not from another 01865 landline, but it now depends on your provider: Ofcom stopped requiring providers to offer local (code-free) dialling on 11 March 2022. Dialling 01865 first always works, and mobiles always need it.

How are 01865 numbers written?

Numbers on 01865 use Ofcom's 4+6 format: the 5-digit code (including the leading 0) followed by a 6-digit local number — written like 01865 234 567. From abroad the leading zero is dropped: +44 1865 then the local number.

What was the 01865 area code before?

01865 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 0865. Old signage or stationery showing 0865 refers to the same Oxford numbers.

Which phone companies hold 01865 numbers?

Ofcom lists 95 providers with allocated blocks on 01865. The largest are BT with 154 of the 400 allocated blocks, Gamma Telecom Holdings Limited with 44 of the 400 allocated blocks and Vodafone with 18 of the 400 allocated blocks. Numbers can be ported, so a number's current provider may differ from the block's holder.

Are 01865 numbers reported as scams?

Visitors have checked 29 different 01865 numbers here 31 times since May 2026.

Which area codes are next to 01865?

By distance between exchange towns, the nearest other codes are 01235 Abingdon (14 km), 01869 Bicester (14 km), 01993 Witney (15 km) and 01844 Thame (22 km).

How do I report a scam call from a 01865 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.