05 Numbers

Corporate and VOIP use

UK telephone numbers beginning '05' fall into three categories:

0500 freephone

A few old-style freephone numbers starting with 0500 are still in operation, but will be withdrawn during 2017. Newer freephone numbers begin with 080.

055 corporate numbering

These numbers are intended for large organisations who require their own large blocks of dedicated telephone numbers that are not associated with a specific locality.

Few organisations have adopted these numbers and the only 055 numbers currently in use begin 05511, 05516, 05555 and 05588.

056 VOIP and similar

Officially designated for 'location independent electronic communication services', 056 numbers are mostly used for VOIP phone services. Such services have also been able to use standard '01' and '02' area codes since late 2004.

Numbers beginning 05600, 05601, 05602 and 05603 are currently in use.

Number format

05xxx xxxxxx is typical for most numbers, with 0500 xxxxxx used for the remaining freephone services in this range.