01204 Area Code
The dialling code for Bolton: what 01204 numbers are, who holds them, and what to do about a call you don't recognise.
What Is the 01204 Area Code?
Bolton landline number. 01204 is the dialling code for Bolton. Numbers starting 01204 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Bolton.
Who was the range allocated to?
Ofcom has allocated 01204 numbers to 118 providers. The largest holders are BT, Virgin Media Limited and Vodafone Ltd (C&W).
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 01204 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 01204 Range
| Number type | Bolton landline number |
|---|---|
| Area | Bolton |
| Number format | 01204 XXXXXX |
| Allocated by Ofcom | 67% of the range, to 118 providers |
| First allocation on record | 15 July 1994 |
| Most recent allocation | 26 June 2026 |
Largest holders of 01204 numbers
| Provider (as allocated by Ofcom) | Share of range | First allocated |
|---|---|---|
| BT | 28% | 15 July 1994 |
| Virgin Media Limited | 7% | 15 July 1994 |
| Vodafone Ltd (C&W) | 5% | 18 June 2013 |
| Gamma Telecom Holdings Limited | 3% | 15 November 2012 |
| Sky UK Limited | 2% | 20 June 2013 |
| TalkTalk Communications Limited | 2% | 3 March 2009 |
112 more providers hold smaller blocks.
Allocation data: Ofcom numbering data, as published 28 October 2026.
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Common Questions About 01204 Numbers
Where is the 01204 area code?
01204 is the dialling code for Bolton. Numbers starting 01204 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Bolton.
Is 01204 a mobile number?
No. 01204 is a landline (geographic) area code for Bolton. UK mobile numbers start with 07.
Who does the 01204 range belong to?
Ofcom has allocated 01204 numbers to 118 providers. The largest holders are BT, Virgin Media Limited and Vodafone Ltd (C&W). 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 01204 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 01204 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.