02381 Area Code
The dialling code for Southampton: what 02381 numbers are, who holds them, and what to do about a call you don't recognise.
What Is the 02381 Area Code?
Southampton landline number. 02381 numbers are UK landline numbers in the 023 area code, which covers Southampton and Portsmouth (Southampton). Internet phone services can use them too, so a caller is not necessarily there.
Who was the range allocated to?
Ofcom has allocated 02381 numbers to 72 providers. The largest holders are Digital Space Group Limited, TalkTalk Communications Limited 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 02381 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 02381 Range
| Number type | Southampton landline number |
|---|---|
| Area | Southampton |
| Part of | the 023 area code (Southampton and Portsmouth) |
| Number format | 023 81XX XXXX |
| Allocated by Ofcom | 80% of the range, to 72 providers |
| First allocation on record | 13 January 2006 |
| Most recent allocation | 17 March 2026 |
Largest holders of 02381 numbers
| Provider (as allocated by Ofcom) | Share of range | First allocated |
|---|---|---|
| Digital Space Group Limited | 3% | 9 June 2008 |
| TalkTalk Communications Limited | 3% | 14 July 2006 |
| Gamma Telecom Holdings Limited | 2% | 11 March 2021 |
| Sky UK Limited | 2% | 24 June 2013 |
| Virgin Media Limited | 2% | 24 January 2006 |
| Vodafone Ltd (C&W) | 2% | 20 June 2013 |
66 more providers hold smaller blocks.
Allocation data: Ofcom numbering data, as published 28 October 2026.
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Common Questions About 02381 Numbers
Where is the 02381 area code?
02381 numbers are UK landline numbers in the 023 area code, which covers Southampton and Portsmouth (Southampton). Internet phone services can use them too, so a caller is not necessarily there.
Is 02381 a mobile number?
No. 02381 is a landline (geographic) area code for Southampton. UK mobile numbers start with 07.
Who does the 02381 range belong to?
Ofcom has allocated 02381 numbers to 72 providers. The largest holders are Digital Space Group Limited, TalkTalk Communications Limited 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 02381 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 02381 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.