01851 Area Code
The dialling code for Great Bernera: what 01851 numbers are, who holds them, and what to do about a call you don't recognise.
What Is the 01851 Area Code?
Great Bernera landline number. 01851 is the dialling code for Great Bernera. Numbers starting 01851 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Great Bernera.
Who was the range allocated to?
Ofcom has allocated 01851 numbers to 81 providers. The largest holders are BT, TTNC Limited and TelNG 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 01851 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 01851 Range
| Number type | Great Bernera landline number |
|---|---|
| Area | Great Bernera |
| Number format | 01851 XXXXXX |
| Allocated by Ofcom | 37% of the range, to 81 providers |
| First allocation on record | 15 July 1994 |
| Most recent allocation | 26 January 2026 |
Largest holders of 01851 numbers
| Provider (as allocated by Ofcom) | Share of range | First allocated |
|---|---|---|
| BT | 16% | 15 July 1994 |
| TTNC Limited | 2% | 13 November 2013 |
| TelNG Limited | 2% | 1 March 2007 |
| Magrathea Telecommunications Limited | 2% | 24 September 2004 |
| Vodafone Ltd (C&W) | 1% | 6 September 2013 |
| Barritel Limited | 1% | 2 October 2006 |
75 more providers hold smaller blocks.
Allocation data: Ofcom numbering data, as published 28 October 2026.
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Common Questions About 01851 Numbers
Where is the 01851 area code?
01851 is the dialling code for Great Bernera. Numbers starting 01851 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Great Bernera.
Is 01851 a mobile number?
No. 01851 is a landline (geographic) area code for Great Bernera. UK mobile numbers start with 07.
Who does the 01851 range belong to?
Ofcom has allocated 01851 numbers to 81 providers. The largest holders are BT, TTNC Limited and TelNG 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 01851 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 01851 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.