03123 numbers

Ofcom records show that numbers starting 03123 are protected from allocation. Where numbering capacity has been withdrawn from service, the block or code is sterilised for a period, typically 2 years. Alternatively the Ofcom Numbering Unit might protect capacity for a limited period, to avoid dialling errors into similar codes

The correct way to write telephone numbers beginning 03123 is in the format 0312 xxx xxxx

For more information on tariffs and usage of numbers starting 03 please visit the page on 03 numbers

A table of the code allocations for numbers starting 03123 is available