Ofcom
This number is listed by Ofcom on its own website (Ofcom advice and complaints (geographic alternative)).
Source: “and complaints 0300 123 3333 or 020 7981 3040” (opens in a new tab). Checked 13 October 2026.
This could still be a scam call
Criminals can make their number look like a genuine one (this is called spoofing). If someone calls from this number and asks for money, bank details, a code or passwords, hang up. Then call Ofcom back on a number you've found yourself, such as the one on their own website or on a letter or bill from them.