01379 Area Code
The dialling code for Diss: what 01379 numbers are, who holds them, and what to do about a call you don't recognise.
What Is the 01379 Area Code?
Diss landline number. 01379 is the dialling code for Diss. Numbers starting 01379 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Diss.
Who was the range allocated to?
Ofcom has allocated 01379 numbers to 92 providers. The largest holders are BT, GCI Network Solutions 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 01379 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 01379 Range
| Number type | Diss landline number |
|---|---|
| Area | Diss |
| Number format | 01379 XXXXXX |
| Allocated by Ofcom | 43% of the range, to 92 providers |
| First allocation on record | 15 July 1994 |
| Most recent allocation | 19 October 2026 |
Largest holders of 01379 numbers
| Provider (as allocated by Ofcom) | Share of range | First allocated |
|---|---|---|
| BT | 14% | 15 July 1994 |
| GCI Network Solutions Limited | 2% | 25 April 2017 |
| Vodafone Ltd (C&W) | 2% | 5 September 2013 |
| Digital Space Group Limited | 1% | 30 November 2007 |
| Gamma Telecom Holdings Limited | 1% | 8 March 2005 |
| (Aq) Limited | 1% | 19 October 2011 |
86 more providers hold smaller blocks.
Allocation data: Ofcom numbering data, as published 28 October 2026.
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Common Questions About 01379 Numbers
Where is the 01379 area code?
01379 is the dialling code for Diss. Numbers starting 01379 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Diss.
Is 01379 a mobile number?
No. 01379 is a landline (geographic) area code for Diss. UK mobile numbers start with 07.
Who does the 01379 range belong to?
Ofcom has allocated 01379 numbers to 92 providers. The largest holders are BT, GCI Network Solutions 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 01379 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 01379 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.