0300 Area Code
UK non-geographic number range: what 0300 numbers are, who holds them, and what to do about a call you don't recognise.
What Is the 0300 Area Code?
UK non-geographic number. 0300 numbers are UK non-geographic numbers, used by businesses, charities and public bodies. They are not tied to a place, cost no more to call than an 01 or 02 landline, and count towards inclusive minutes.
Who was the range allocated to?
Ofcom has allocated 0300 numbers to 85 providers. The largest holders are Gamma Telecom Holdings Limited, BT and Lumen Technologies UK 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 0300 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 0300 Range
| Number type | UK non-geographic number |
|---|---|
| Area | Not tied to a location |
| Number format | 0300 XXX XXXX |
| Allocated by Ofcom | 23% of the range, to 85 providers |
| First allocation on record | 26 March 2007 |
| Most recent allocation | 11 August 2026 |
Largest holders of 0300 numbers
| Provider (as allocated by Ofcom) | Share of range | First allocated |
|---|---|---|
| Gamma Telecom Holdings Limited | 4% | 26 March 2007 |
| BT | 3% | 26 March 2007 |
| Lumen Technologies UK Limited | 2% | 5 June 2007 |
| Colt Technology Services | 2% | 25 July 2018 |
| TalkTalk Communications Limited | 1% | 26 March 2007 |
| Vodafone Ltd (C&W) | 1% | 18 June 2013 |
79 more providers hold smaller blocks.
Allocation data: Ofcom numbering data, as published 28 October 2026.
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Common Questions About 0300 Numbers
Is 0300 a free number?
No, but it is not premium rate either. Calls to 0300 numbers cost no more than calls to an 01 or 02 landline and count towards inclusive minutes on mobile and landline packages.
Where is the 0300 area code?
Nowhere in particular. 0300 is a non-geographic number, so it is not tied to a town or region. It costs the same to call as an 01 or 02 landline.
Who does the 0300 range belong to?
Ofcom has allocated 0300 numbers to 85 providers. The largest holders are Gamma Telecom Holdings Limited, BT and Lumen Technologies UK 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 0300 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 0300 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.