01665 Area Code
The dialling code for Alnwick: what 01665 numbers are, who holds them, and what to do about a call you don't recognise.
What Is the 01665 Area Code?
Alnwick landline number. 01665 is the dialling code for Alnwick. Numbers starting 01665 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Alnwick.
Who was the range allocated to?
Ofcom has allocated 01665 numbers to 89 providers. The largest holders are BT, GCI Network Solutions Limited and Digital Space Group Limited.
Numbers can be moved (ported) between networks, so the network a caller uses today may not be the one Ofcom allocated the block to. The allocation does not identify the person or business using a number.
Had a call from a 01665 number you don't recognise?
We can't tell you who called: an area code only shows the type of number and the provider Ofcom allocated the range to.
- Don't call back in a hurry, even if a message says it's urgent. Never give bank details or security codes on a call you didn't expect.
- Block the number from your phone's recent calls list.
- Forward scam texts free to 7726. Report unwanted marketing calls to the ICO, and see Ofcom's advice on scam calls.
- Register your number with the Telephone Preference Service to opt out of sales calls.
About the 01665 Range
| Number type | Alnwick landline number |
|---|---|
| Area | Alnwick |
| Number format | 01665 XXXXXX |
| Allocated by Ofcom | 45% of the range, to 89 providers |
| First allocation on record | 15 July 1994 |
| Most recent allocation | 29 June 2026 |
Largest holders of 01665 numbers
| Provider (as allocated by Ofcom) | Share of range | First allocated |
|---|---|---|
| BT | 8% | 15 July 1994 |
| GCI Network Solutions Limited | 2% | 26 April 2017 |
| Digital Space Group Limited | 1% | 16 May 2008 |
| Simwood eSMS Limited | 1% | 27 April 2012 |
| Vodafone Ltd (C&W) | 1% | 9 September 2013 |
| (Aq) Limited | 1% | 12 September 2012 |
83 more providers hold smaller blocks.
Allocation data: Ofcom numbering data, as published 28 October 2026.
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Common Questions About 01665 Numbers
Where is the 01665 area code?
01665 is the dialling code for Alnwick. Numbers starting 01665 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Alnwick.
Is 01665 a mobile number?
No. 01665 is a landline (geographic) area code for Alnwick. UK mobile numbers start with 07.
Who does the 01665 range belong to?
Ofcom has allocated 01665 numbers to 89 providers. The largest holders are BT, GCI Network Solutions Limited and Digital Space Group Limited. Numbers can be moved (ported) between networks, so the network a caller uses today may not be the one Ofcom allocated the block to. The allocation does not identify the person or business using a number.
Who called me from a 01665 number?
We can't tell you who called. An area code only shows the type of number and which provider Ofcom allocated the range to. If you don't recognise a 01665 number, don't call back in a hurry, and never give out bank details or security codes on a call you didn't expect.
Block the number from your phone's recent calls list. Forward scam texts free to 7726, report unwanted marketing calls to the ICO, and see Ofcom's advice on scam calls.