Who called me from 07733 457 310?

077 334 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 0773341234 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 — 077 334 XXXXX — was allocated by Ofcom to Vodafone in 2000. Vodafone either operates the numbers directly or sub-allocates them to resellers and downstream carriers, which is why a single 077 334 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.

Keep in mind that a phone number is a clue, not proof of identity. UK caller IDs can be forged (spoofed) by VoIP systems anywhere in the world, and legitimate numbers are sometimes hijacked for short scam campaigns then abandoned. Judge each call on its substance: a genuine organisation will happily let you hang up and call back via the number on its official website.

• Don't act on the call alone. If the caller claimed to be your bank, HMRC, a courier or a utility, hang up and contact the organisation on a number you find yourself — never one the caller gives you. For banks, dial 159.
• Never share security details. Full passwords, PINs and one-time passcodes are never requested by legitimate UK organisations on an outbound call.
• Don't return a missed call you don't recognise. One-ring 'wangiri' scams rely on call-backs, sometimes routed to premium-rate lines.
• Report what happened. Use the report form above to warn other UK users, and report fraud attempts to Action Fraud (or 101 in Scotland).
• If money or details were given, contact your bank immediately on 159 and report to Action Fraud.

Block 07733 457 310 on your phone

On iPhone: open Phone → Recents, tap the ⓘ next to 07733 457 310 and choose Block this Caller. On Android: open Phone → Recents, tap the number and choose Block/report spam. Landline customers of BT, Sky, TalkTalk and Virgin Media can enable free network-level call screening in their provider's app, which stops the call before the phone ever rings.

Report 07733 457 310 to the authorities

Report scam calls to Action Fraud (England, Wales & NI) or call 101 in Scotland. Persistent nuisance or silent calls go to Ofcom, and unlawful marketing calls to the ICO. Scam texts can be forwarded free to 7726. Registering with the Telephone Preference Service (tpsonline.org.uk) cuts legitimate UK marketing calls.

Energy-rebate and 'green grant' scams have been linked to UK landline blocks like 077 334 XXXXX. The caller claims you're eligible for a government rebate or smart-meter grant and pressures you into giving bank details to receive it. Real government rebates apply to your bill automatically — no outbound call is needed.

See the full picture for this range on the 077 334 XXXXX block page or the 077 (UK Mobile) area code page.