Telephone numbers in the United Kingdom
Telephone numbers in the United Kingdom are administered by the Office of Communications (Ofcom). For this purpose, Ofcom established a telephone numbering plan, known as the National Telephone Numbering Plan, which is the system for assigning telephone numbers to subscriber stations.
|NSN length||7, 9, 10|
|Typical format||various, see text|
|Numbering plan||The National Telephone Numbering Plan|
|Last updated||18 September 2010|
|Country calling code||+44|
|International call prefix||00|
|List of United Kingdom dialing codes|
The numbers are of variable length. Local numbers are supported from land-lines or numbers can be dialled with a '0'-lead prefix that denotes either a geographical region or another service. Mobile phone numbers have their own prefixes which are not geographical and are completely portable between providers.