Calls from 078 931 XXXXX — UK mobile
Block 078 931 XXXXX is allocated by Ofcom to 24 Seven Communications Limited (allocated 2008).
078 931 XXXXX is a UK mobile number block. UK mobiles use prefixes 071–075 and 077–079, with 076 reserved for radiopagers and 070 for personal-numbering services. A number such as 0789311234 could be active on any of the four UK mobile networks — EE, O2, Vodafone or Three — or any of the dozens of MVNOs (mobile virtual network operators) that lease capacity from them, including Tesco Mobile, Sky Mobile, giffgaff, Smarty, Lebara and Voxi.
This block — 078 931 XXXXX — was allocated by Ofcom to 24 Seven Communications Limited in 2008. 24 Seven Communications Limited either operates the numbers directly or sub-allocates them to resellers and downstream carriers, which is why a single 078 931 XXXXX prefix can be used by many different organisations. You can verify any allocation against Ofcom's National Telephone Numbering Plan, which is updated weekly.
The HMRC-impersonation scam continues to be the most-reported telephone scam in the UK, and blocks like 078 931 XXXXX are sometimes spoofed for these calls. HMRC will never threaten arrest, demand payment by gift card or cryptocurrency, or use a 'press 1 to speak to an officer' menu. If in doubt, hang up and contact HMRC on the number printed on their gov.uk page.
If a 078 931 XXXXX number called you and you're not sure who it was, the safest steps are: don't return the call until you've verified it (search the full number online first), don't share personal or financial details, and register the number with the Telephone Preference Service (TPS) if it's a marketing call. Persistent unwanted calls can be reported to Ofcom and the ICO. To block a specific number on most UK mobiles and landlines, you can also enable network-level call screening through your provider.
FAQs about 078 931 XXXXX
Is 078 931 XXXXX a real UK phone number?
Yes. 078 931 XXXXX is part of an Ofcom-allocated UK number block — any number starting with that prefix is a real, dialable UK number assigned by Ofcom to 24 Seven Communications Limited for use on the UK public telephone network.
Who owns the 078 931 XXXXX number block?
078 931 XXXXX is currently allocated to 24 Seven Communications Limited in Ofcom's National Telephone Numbering Plan. The allocated carrier may operate the numbers directly or sub-allocate them to downstream resellers — both arrangements are normal under UK telecoms rules.
Can I tell which network a 078 931 XXXXX mobile number is on?
Not from the prefix alone. UK mobile numbers have been portable between networks since 1999, so even though 078 931 XXXXX was originally allocated to 24 Seven Communications Limited, the individual subscriber's number could have been moved to any other UK network. Live network-lookup tools query the central UK porting database to find the current network.
How do I block calls from 078 931 XXXXX?
On most UK smartphones, open the recent-calls list, tap the number, and choose 'Block this caller'. UK landlines from BT, Sky, TalkTalk and Virgin Media include free 'BT Call Protect'-style screening you can enable in your provider's app. You can also register your number with the Telephone Preference Service (TPS) at tpsonline.org.uk to opt out of legitimate UK marketing calls.
Other blocks in 078
Try a different block within the same UK area code:
