Skip to content
O2 (Telefonica) · reported numbers

O2 (Telefonica) Spam Calls — UK Numbers Most Reported on Our Checker

Ranking of the O2 (Telefonica)-allocated UK numbers most-looked-up on our free UK Phone Number Checker. These rankings reflect public lookup interest, which strongly correlates with scam / nuisance call reporting. Currently tracking 547 distinct numbers across 822 public lookups.

Top-looked-up O2 (Telefonica) numbers

Click any number to see its full lookup page with risk-level, range holder, community reports and related numbers.

NumberSearchesLast looked up
07395 60****13 15 May 2026
07394 51****12 22 May 2026
07354 16****11 18 May 2026
07394 08****10 19 May 2026
07394 57****10 17 May 2026
07354 24****9 22 May 2026
07354 69****9 20 May 2026
07394 18****8 15 May 2026
07394 07****7 16 May 2026
07394 04****6 12 May 2026
07395 62****6 20 May 2026
07514 69****5 14 May 2026
07394 05****4 19 May 2026
07394 05****4 13 May 2026
07394 47****4 20 May 2026
07395 51****4 12 May 2026
07395 60****4 21 May 2026
07395 62****4 14 May 2026
07510 03****4 20 May 2026
07511 11****4 18 May 2026

About O2 (Telefonica) in the Ofcom register

O2 (Telefonica) is one of the UK communications providers allocated number ranges by Ofcom under the National Telephone Numbering Plan. Number allocations are recorded against the legal entity Telefonica UK Limited. Numbers within those ranges may now be in active use by the original allocated subscriber, may have been ported to another carrier under UK number portability rules, or may have been re-issued after being returned to the operator's pool — so the Ofcom range holder is not a guarantee of the current call source.

Spotted a number not on this page?

Use our free UK Phone Number Checker to look up any UK number — the result will show the Ofcom range holder, risk-level, and any community reports we have on file. You can also add your own report directly on the checker results page.

Sitemap