02870 Area Code
The dialling code for Coleraine: what 02870 numbers are, who holds them, and what to do about a call you don't recognise.
What Is the 02870 Area Code?
Coleraine landline number. 02870 numbers are UK landline numbers in the 028 area code, which covers Northern Ireland (Coleraine). Internet phone services can use them too, so a caller is not necessarily there.
Who was the range allocated to?
Ofcom has allocated 02870 numbers to 71 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 02870 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 02870 Range
| Number type | Coleraine landline number |
|---|---|
| Area | Coleraine |
| Part of | the 028 area code (Northern Ireland) |
| Number format | 028 70XX XXXX |
| Allocated by Ofcom | 62% of the range, to 71 providers |
| First allocation on record | 26 May 1999 |
| Most recent allocation | 26 January 2026 |
Largest holders of 02870 numbers
| Provider (as allocated by Ofcom) | Share of range | First allocated |
|---|---|---|
| BT | 8% | 26 May 1999 |
| Digital Space Group Limited | 2% | 9 June 2008 |
| GCI Network Solutions Limited | 2% | 19 April 2017 |
| TalkTalk Communications Limited | 2% | 22 May 2007 |
| Virgin Media Limited | 2% | 26 May 1999 |
| Fuse 2 Communications Ltd | 1% | 3 July 2017 |
65 more providers hold smaller blocks.
Allocation data: Ofcom numbering data, as published 28 October 2026.
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Common Questions About 02870 Numbers
Where is the 02870 area code?
02870 numbers are UK landline numbers in the 028 area code, which covers Northern Ireland (Coleraine). Internet phone services can use them too, so a caller is not necessarily there.
Is 02870 a mobile number?
No. 02870 is a landline (geographic) area code for Coleraine. UK mobile numbers start with 07.
Who does the 02870 range belong to?
Ofcom has allocated 02870 numbers to 71 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 02870 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 02870 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.