0337 numbers

Ofcom records show that numbers starting 0337 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 Where numbering capacity has been withdrawn from service, the block or code is sterilised for a period, typically 2 years.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 0337 is in the format 0337 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 0337 is available