01239 Area Code
The dialling code for Cardigan: what 01239 numbers are, who holds them, and what to do about a call you don't recognise.
What Is the 01239 Area Code?
Cardigan landline number. 01239 is the dialling code for Cardigan. Numbers starting 01239 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Cardigan.
Who was the range allocated to?
Ofcom has allocated 01239 numbers to 88 providers. The largest holders are BT, Digital Space Group Limited and GCI Network Solutions 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 01239 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 01239 Range
| Number type | Cardigan landline number |
|---|---|
| Area | Cardigan |
| Number format | 01239 XXXXXX |
| Allocated by Ofcom | 49% of the range, to 88 providers |
| First allocation on record | 15 July 1994 |
| Most recent allocation | 26 January 2026 |
Largest holders of 01239 numbers
| Provider (as allocated by Ofcom) | Share of range | First allocated |
|---|---|---|
| BT | 14% | 15 July 1994 |
| Digital Space Group Limited | 1% | 29 November 2007 |
| GCI Network Solutions Limited | 1% | 20 April 2017 |
| AQL Wholesale Ltd | 1% | 21 June 2006 |
| Andrews & Arnold (Numbers) Ltd | 1% | 26 February 2009 |
| Barritel Limited | 1% | 8 October 2008 |
82 more providers hold smaller blocks.
Allocation data: Ofcom numbering data, as published 28 October 2026.
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Common Questions About 01239 Numbers
Where is the 01239 area code?
01239 is the dialling code for Cardigan. Numbers starting 01239 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Cardigan.
Is 01239 a mobile number?
No. 01239 is a landline (geographic) area code for Cardigan. UK mobile numbers start with 07.
Who does the 01239 range belong to?
Ofcom has allocated 01239 numbers to 88 providers. The largest holders are BT, Digital Space Group Limited and GCI Network Solutions 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 01239 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 01239 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.