Who called me from a Twelve Telecom Limited number?

Twelve Telecom Limited is a UK communications provider. That means Ofcom has allocated Twelve Telecom Limited one or more blocks of UK telephone numbers under the National Telephone Numbering Plan, which Twelve Telecom Limited can either use for its own customers or sub-allocate to resellers and downstream providers. In total, Twelve Telecom Limited currently holds 24 allocated number blocks in our copy of the Ofcom plan.

Twelve Telecom Limited's number ranges are concentrated in 0843, 0872, 0870, 070. Across all of its allocations the split is roughly 19 premium-rate, 2 personal, 1 03 non-geographic, 1 freephone, 1 geographic landline blocks. You can use the tables below to jump straight to a specific Twelve Telecom Limited area code or number block and see the common call patterns reported for it.

The oldest Twelve Telecom Limited number block in the Ofcom data was allocated in 2013, and the most recent in 2017. Allocation dates matter because a number that has been live for many years is more likely to be a settled business or residential line, whereas a very recently-allocated block is more commonly seen in VoIP and virtual-number services — the kind sometimes used for short-lived marketing or scam campaigns.

Is a Twelve Telecom Limited number safe to answer? In most cases, yes — the overwhelming majority of calls from any UK provider's range are ordinary, legitimate calls. However, two things are important to understand. First, because Twelve Telecom Limited can sub-allocate or resell its numbers, the fact that a number sits in a Twelve Telecom Limited block does not mean Twelve Telecom Limited itself is calling you. Second, UK caller IDs can be spoofed: scammers can make a call appear to come from a Twelve Telecom Limited number they don't control. So treat the number as a clue, not proof — judge the call on what the caller actually asks for.

If a Twelve Telecom Limited number called you and you're unsure, don't share security details, bank information or one-time passcodes, and don't return the call until you've verified it independently. You can block the specific number on any UK smartphone from the recent-calls list, enable free network-level call screening through your own landline provider, and register with the Telephone Preference Service (TPS) to cut legitimate marketing calls. Persistent nuisance calls can be reported to Ofcom, and suspected scams to Action Fraud (or Police Scotland on 101).