01 numbers

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See Sabc.txt for the UK area code list.

Numbers beginning with 01 are designated as 'geographic' numbers, that is, the first part of the number (the dialling code) specifies geographically where the number is located, within a 20-mile radius of its charge group. Historically calls to these numbers were charged at local, regional or national rate but nowadays most Communications Providers charge a flat rate regardless of location, commonly known as 'geographic' rate.

Typically 01 numbers are ten digits in length, not including the initial 0 trunk code; e.g.

  • (0113) 384 3275
  • (01442) 329495

The above numbers are examples of the 3+7 and 4+6 formats.

There are still some telephone exchanges with five digit subscriber numbers, and Brampton still has some four digit subscriber numbers. Some of these telephone numbers have only nine digits, not including the initial 0 trunk code; e.g.

  • (01420) 82395
  • (015242) 45789
  • (016977) 2345

The above numbers are examples of the 4+5, 5+5 and 5+4 formats.

Additionally, subscriber numbers beginning 0 or 1 within every area code are allocated as National Dialling Only numbers.


Contents

01 charge groups with 3 digit area code and 7 digit local numbers (3+7)

  • 0113 — Leeds
  • 0114 — Sheffield
  • 0115 — Nottingham
  • 0116 — Leicester
  • 0117 — Bristol
  • 0118 — Reading
  • 0121 — Birmingham
  • 0131 — Edinburgh
  • 0141 — Glasgow
  • 0151 — Liverpool
  • 0161 — Manchester
  • 0191 — Tyneside (ELNS area)

In all of the above cases, subscriber numbers have seven digits. One area is an ELNS area.

01 charge groups with 4 digit area code and 6 digit local numbers (4+6)

Most area codes beginning 01 (but not those beginning 011x or 01x1 - see above) use the 4+6 number format.

About forty of the area codes using 4+6 format numbers also have some number ranges within the same area code using the 4+5 format (see below).

Six of the area codes using 4+6 format numbers (01387, 01524, 01539, 01697, 01768, 01946) share part of their number space with the twelve mixed areas using 5+5 format numbers (see table below). Additionally, one of those areas using 5+5 format numbers (016977) also has some 5+4 format numbers (see below).

Fourteen area codes beginning 01 and using 4+6 format numbers (01229, 01339, 01388, 01423, 01430, 01434, 01437, 01507, 01686, 01847, 01851, 01890, 01964, 01975) are ELNS areas.

01 charge groups with 4 digit area code and 5 digit local numbers (4+5)

  • 01204 — Bolton
  • 01208 — Bodmin
  • 01254 — Blackburn
  • 01276 — Camberley
  • 01297 — Axminster
  • 01298 — Buxton
  • 01363 — Crediton
  • 01364 — Ashburton
  • 01384 — Dudley
  • 01386 — Evesham
  • 01404 — Honiton
  • 01420 — Alton
  • 01460 — Chard
  • 01461 — Gretna
  • 01480 — Huntingdon
  • 01488 — Hungerford
  • 01524 — Lancaster (Mixed area)
  • 01527 — Redditch
  • 01562 — Kidderminster
  • 01566 — Launceston
  • 01606 — Northwich
  • 01629 — Matlock
  • 01635 — Newbury
  • 01647 — Moretonhampstead
  • 01659 — Sanquhar
  • 01695 — Skelmersdale
  • 01726 — St Austell
  • 01744 — St Helens
  • 01750 — Selkirk
  • 01768 — Penrith (Mixed area)
  • 01827 — Tamworth
  • 01837 — Okehampton
  • 01884 — Tiverton
  • 01900 — Workington
  • 01905 — Worcester
  • 01935 — Yeovil
  • 01946 — Whitehaven (Mixed area)
  • 01949 — Whatton
  • 01963 — Wincanton
  • 01995 — Garstang

In all of the above cases, these areas have a mix of five and six digit subscriber numbers.

Additionally, the area codes 01524, 01768 and 01946 are mixed areas. Part of their number range is shared by five digit area codes with those other numbers using 5+5 format (see below).

01 charge groups with 5 digit area code and 5 digit local numbers (5+5)

  • 013873 — Langholm
  • 015242 — Hornby-with-Farleton
  • 015394 — Hawkshead
  • 015395 — Grange-over-Sands
  • 015396 — Sedbergh
  • 016973 — Wigton
  • 016974 — Raughton Head
  • 016977 — Brampton
  • 017683 — Appleby-in-Westmorland
  • 017684 — Pooley Bridge
  • 017687 — Keswick
  • 019467 — Gosforth

All of the above area codes are a part of mixed areas.

In all of the above cases, subscriber numbers have five digits. One area also has some four digit subscriber numbers (see below).

01 charge groups with 5 digit area code and 4 digit local numbers (5+4)

The 016977 area has a mix of five digit (see above) and four digit subscriber numbers.

Note: Ofcom's sabc.txt file incorrectly lists 016977 as being a four-digit area code. In fact, 016977 is a five-digit area code.


Number format for all 01 and 02 area codes

Number Format NSN Geographic Area Code
2+8 only 10 020, 023, 024, 028, 029
3+7 only 10 0113, 0114, 0115, 0116, 0117, 0118, 0121, 0131, 0141, 0151, 0161, 0191
4+6 only 10 All 01xxx area codes from 01200 to 01999 not otherwise mentioned.
4+6 areas where part of range is assigned as 5+5 10 01387, 01539
4+6 areas where part of range is assigned as mixed 5+5 and 5+4 10 (or 9) 01697
Mixed 4+6 and 4+5 10 or 9 01204, 01208, 01254, 01276, 01297, 01298, 01363, 01364, 01384, 01386, 01404, 01420, 01460, 01461, 01480, 01488, 01527, 01562, 01566, 01606, 01629, 01635, 01647, 01659, 01695, 01726, 01744, 01750, 01827, 01837, 01884, 01900, 01905, 01935, 01949, 01963, 01995
Mixed 4+6 and 4+5 areas where part of range is assigned as 5+5 10 or 9 01524, 01768, 01946
5+5 only 10 013873, 015242, 015394, 015395, 015396, 016973, 016974, 017683, 017684, 017687, 019467
Mixed 5+5 and 5+4 10 or 9 016977

The number format '2+8' refers to, e.g. London, numbers using the (020) xxxx xxxx format.

The number format '5+4' refers to, e.g. Brampton, numbers using the (016977) xxxx format.

See also

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