01246 Area Code
The dialling code for Chesterfield: what 01246 numbers are, who holds them, and what to do about a call you don't recognise.
What Is the 01246 Area Code?
Chesterfield landline number. 01246 is the dialling code for Chesterfield. Numbers starting 01246 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Chesterfield.
Who was the range allocated to?
Ofcom has allocated 01246 numbers to 110 providers. The largest holders are BT, Vodafone Ltd (C&W) and Gamma Telecom Holdings 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 01246 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 01246 Range
| Number type | Chesterfield landline number |
|---|---|
| Area | Chesterfield |
| Number format | 01246 XXXXXX |
| Allocated by Ofcom | 60% of the range, to 110 providers |
| First allocation on record | 15 July 1994 |
| Most recent allocation | 30 June 2026 |
Largest holders of 01246 numbers
| Provider (as allocated by Ofcom) | Share of range | First allocated |
|---|---|---|
| BT | 27% | 15 July 1994 |
| Vodafone Ltd (C&W) | 5% | 3 October 2013 |
| Gamma Telecom Holdings Limited | 2% | 5 April 2004 |
| Sky UK Limited | 2% | 25 June 2013 |
| GCI Network Solutions Limited | 2% | 20 April 2017 |
| Barritel Limited | 1% | 16 November 2011 |
104 more providers hold smaller blocks.
Allocation data: Ofcom numbering data, as published 28 October 2026.
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Common Questions About 01246 Numbers
Where is the 01246 area code?
01246 is the dialling code for Chesterfield. Numbers starting 01246 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Chesterfield.
Is 01246 a mobile number?
No. 01246 is a landline (geographic) area code for Chesterfield. UK mobile numbers start with 07.
Who does the 01246 range belong to?
Ofcom has allocated 01246 numbers to 110 providers. The largest holders are BT, Vodafone Ltd (C&W) and Gamma Telecom Holdings 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 01246 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 01246 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.