We have put together a quick guide to calling UK 01 and 02 telephone numbers. Calls to standard UK 01 (geographic) numbers are usually included in the inclusive minutes of your monthly contract with O2. However, if you’ve used up your allowance or if you’re on Pay As You Go (PAYG) you will incur additional charges.
At-a-Glance Price Table
| Plan Type / Situation | Cost for calling 01/02/03 number (per minute) |
| Pay Monthly (within allowance) | Free (included in bundle) |
| Pay Monthly (outside allowance / out-of-bundle | £0.35 / min |
| Pay As You Go (standard tariff) | £0.30 / min |
Why Do Rates Vary?
The cost of calling an 01 number from O2 depends on the type of plan you have. Pay Monthly customers have these calls included in their bundle, meaning they pay nothing as long as they stay within their allowance. However, once inclusive minutes are used, O2 applies an out-of-bundle rate of 35p per minute. PAYG customers instead pay O2’s standard landline rate of 30p per minute. Ofcom guidance also notes that mobile calls to 01 and 02 numbers can range widely (typically between 3p and 65p per minute) depending on the provider and tariff, which explains why costs vary across the industry.
Quick Summary
Calling an 01 number from O2 in 2025 is usually free if you’re on Pay Monthly, provided you stay within your allowance. If you’re on PAYG or regularly exceed your minutes, charges are predictable and relatively straightforward at 30 to 35p per minute. If you rely on frequent calls to geographic numbers (whether personally or for your business), keeping track of your allowance or considering a plan with a larger minute bundle can help keep costs down. Remember, tariffs can change, so it’s always worth checking O2’s most up-to-date pricing to stay informed.
For more info on 01 numbers, call 0330 332 0400 or visit our dedicated page.
