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Number types

UK phone number types

The first digits of a UK number tell you what kind of number it is and roughly what it costs to call. Each page below explains one kind, with GOV.UK call costs and the range data Ofcom publishes.

Blocks in Ofcom's files, by kind of number

Ofcom allocates numbers in blocks of different sizes. A block that is not allocated (free, protected or quarantined) cannot belong to a real phone line. Files of 2026-09-04.

Blocks listed by Ofcom, allocated and not in use, by kind of number
Kind of numberBlocks listedAllocatedNot in useProviders
01, 02 landlines299,08498,871200,213284
03 UK-wide13,7263,45410,266272
055 corporate400263498
056 internet phone59513046530
070 personal3,0617352,32679
07 mobile6,0485,52540073
076 pagers80011737313
080 freephone7,9154,3123,602251
0843-08452,1212,05566222
0870-08731,9641,825139190
090, 091 premium5,5345,198335107
098, 0908, 0909 adult2,5132,32219171

Source: Ofcom, Download numbering data. Ofcom copyright. TextCheckUK is not affiliated with Ofcom.