What is an 03 number?
03 numbers are non-geographic numbers that do not attract a premium and are thus cheaper to call than 0845 and 0870 numbers.
As stated on the Ofcom website:
"Calls to 03 numbers will cost no more than geographic numbers, and will be included as part of any inclusive call minutes or discount schemes for geographic calls. The new numbers will enable organisations to offer a single point of contact without making additional charges for the service."
