How much does it cost to call an 01 number on O2?

Calls to standard UK 01 numbers are usually included in the cost of your monthly allowance if you have a monthly contract phone with O2. However, if you use your monthly allowance, calls to UK 01 numbers will result in call charges. The cost of calling 01 numbers from O2 vary depending on whether you have a monthly contract or pay as you go phone. If you have a monthly contract and make calls to 01 numbers that are outside your allowance, O2 will charge 35p per minute. O2 only have one standard pay as you tariff. Calls from pay as you go to standard UK 01 landline numbers will cost you 30p per minute. Information on call charges to 01 numbers on O2 are available on their website. If you are interested in getting an 01 number of your own, they are available to buy on the Number Supermarket site here.