Ofcom Numbering Site

Details on allocations and availability of UK Telephone Numbers may be accessed below.

(This information is updated weekly where possible).NB. In the bulleted links below, information is available in Excel 97 files and pdf.

  1. Geographic Numbers
  2. UK Wide Numbers
  3. Corporate Numbers and Location Independent Electronic Communications Systems (numbers beginning 055 and 056)
  4. Personal Numbering, Radiopaging & Mobile numbers
  5. Special Services (numbers beginning 08)
  6. Premium Rate Services (numbers beginning 09)
  7. Access Codes

The information on the Telephone Numbers above is also available in Comma-Separated-Variable (CSV) format for downloading. To download (your attention is drawn to the Specification on the linked page which lists changes to fields in the files) click here.

  1. Number Portability Prefix Codes ("NPPC") Carrier Pre Selection ("CPS") Codes Communications Provider Identity ("CUPID") codes Reseller Identity ("RID") codes
  2. Carrier Pre-Selection ("CPS") Codes
  3. Communications Provider Identity ("CUPID") Codes
  4. Reseller Identity ("RID") Codes
  5. Mobile Network Codes ("MNC")

NB. Details of Targetted Transit Codes ("TTC"), National and International Signalling Point Codes ("NSPC") and ("ISPC") respectively, are not shown because of potential security issues. However, details of your own codes may be obtained by contacting Ofcom's Numbering Unit.

Geographic Numbers

Download in MS Excel format:

(Geographic Area Codes beginning 01 and 02)
NB. Due to the size of the file containing all Geographic Numbers, it has been divided into 7 parts for ease of use as follows:

UK Wide numbers

(numbers beginning 03)

05 Numbers

(NB. 9-digit numbers starting with 0500, and other 05 number ranges may be shown in this table, but are not available for Allocation)

Personal Numbering, Radiopaging & Mobile Service numbers

(numbers beginning 07)

  • Personal Numbering (070 numbers)Radiopaging numbers (076 numbers)
  • Mobile numbers (075/7/8/9)

Special Services - issued in blocks of 1k & 10k numbers

(numbers beginning 08)

  • Freephone (0808 1X and 0808 2X ranges, & details on allocated 0800 10k ranges)
  • BT’s Standard Local Call Retail Price for BT customers (0845 XXX ranges)
  • BT’s Standard National Call Retail Price for BT customers (0870 XXX ranges)
  • Up to 5p - non internet (ranges 0844 2XX to 0844 9XX)
  • Up to 10p - non-internet (ranges 0871 2XX to 0871 9XX)
  • Internet for Schools (0820 XXX ranges)

Premium Rate Service numbers

(numbers beginning 090, 091 & 098)

  • Premium Rate Services (090 & 091)
  • Sexual Entertainment (098 & closed scheme numbers 0908 & 0909)

Access Codes

  • Download in MS Excel format
    Type A (eg. 100, 123, etc.)Type B (ususally for Directory Enquiry (DQ) 118XXX services, Indirect Access, etc.)
  • Type C (usually operator own services)

Number Portability Prefix Codes ("NPPC")

NPPCs may be Allocated in response to requests from Communications Providers with Allocations of Telephone Numbers identified in the Number Portability Functional Specification as ranges for which portability should be provided. NPPCs are Allocated as single prefixes that identify the recipient Communications Provider, except for Geographic NPPCs which are Allocated in blocks of 100 in order to identify a recipient and the relevant switch in the relevant provider's Network.Where a Communications Provider does not have an Interconnection agreement with a particular Communications Provider, a portability transit code will be required to allow porting to take place through a third party with whom both Providers have an Interconnect agreement.

Communications Provider Identity ("CUPID") codes

CUPIDs replace LOPIDs which are recognised by the telecoms industry and may be a prerequisite on specific forms used by the industry for services such as Number Portability arrangements, Data Management Amendments (DMA), orders on phone book entries, etc. Click here.

Carrier Pre Selection ("CPS") codes

CPS codes are four digit codes commencing with the digit 8 (e.g. 8XXX). The CPS codes will be Allocated by Oftel to Communications Providers solely in connection with Carrier Pre-Selection, a service that allows customers the choice of routing specific types of calls via a selected United Kingdom Communications Provider without the need to dial a prefix before making a call.If a Communications Provider requests a second 8XXX CPS code, Oftel will Allocate an additional code provided a satisfactory justification of the need for a second code is given to Oftel. Oftel will consider such requests on a case-by-case basis. Communications Providers will not normally be Allocated more than two 8XXX codes for number conservation reasons. A Communications Provider wishing to implement a second 8XXX code on an access Communications Providers' network may need to address consequential issues arising with the access Communications Provider concerned.

Reseller Identity ("RID") codes

Reseller Identity (RID) Codes, which are also known as retailer identity codes, are three character alphabetic codes that are used to identify the reseller when a reseller wishes to offer carrier pre-selection ("CPS") via a wholesale carrier (also known as a 'CPS operator'). RIDs are also used in the provision of wholesale line rental (WLR) when a WLR service provider wishes to transfer a particular line to WLR and retain the existing CPS arrangements on that line. Ofcom will issue a RID to any reseller requesting one by means of a RID application form.

Mobile Network Codes ("MNC")

MNCs are part of the International Mobile Station Identity ("IMSI") code that identify the subscribers host network. The MNC together with the Mobile Country Code ("MCC") uniquely identifies the home network of the mobile terminal or mobile user.

Data Download

They are available either as a single download in a Zip archive or separately in either text or pdf format.

Please refer to the UK Export Specification when downloading the documents.

Download all files

NB: The file is in Zip format and may require up-to-date third-party software to open:

Download files individuallyTo download files to your computer, right-click (PC) or command-click (Mac) and choose 'Save target/link as...'Read Me


S1 Code

S3 Code

S5 Code

S7 Code

S8 Code

S9 Code

S10 Code

UK Telephone Number - export specification

Last Updated: 13/11/06
Issue: 11
These files are all of the comma separated variable (csv) type, using " " as text delimiters.

The fields contained within each file are as follows:

sabc.txt Code, D/DE, Status, Use, Notes, Date
s1_code.txt SABC, D/DE, Status, Date, Operator, Number Length, Change, Notes
s5_code.txt SABC, D/DE, Status, Operator, Notes, Use, Change
s7_code.txt SABC, D/DE, Status, Date, Operator, Use, Notes, Change
s8_code.txt SABC, D/DE, Status, Tariff Notes, Date, Operator, Use, Notes, Change
s9_code.txt SABC, D/DE, Status, Tariff Notes, Date, Operator, Use, Notes, Change
s10_code.txt Code, Type, Status, Function, Operator, Sub-Allocatee, Trading Name, Name of Service, Description of Service, Use, Withdraw, Change

The order of the fields within each file will be maintained. Any changes will be indicated in the 'Change Record', below.

In addition a readme.txt file is included.  This is a plain text file that contains further information regarding UK Telephone Numbers, including a definition of the contents of each field.  It is also used to notify changes that have been made to the codelist.zip files.            


Summary of Change
First Issue
In sabc_de.txt - the ‘notes’ field has been moved to right-hand end.
A new file 'sabc_def.txt' has been added.
A new file 'cps_code.txt' has been added.
s9_code.txt has a 'Tariff Notes' field added, and cps_code.txt and nppc.txt have been removed (cps and nppc codes can now be found here)
A new table has been created sabc.txt, and tables s1_code.txt and sns_code.txt have been deleted.
A new table - s5_code.txt - has been added.
2 fileds have been added to the file: sabc_def.txt i.e. 'Notes' - showing number length, and 'Use' showing what number range is used for.
A new field - 'tariff notes' has been added to file s8_code.txt - showing the tariff for Special Service (non-internet) ranges, up to 5p, and up to 10p respectively.
Four new fields have been added to the s10_code.txt file, after the 'Operator' field: 'Sub-Allocatee'; 'Trading Name'; 'Name of Service'; and 'Description of Service'. These fields specifically relate to allocations of Directory Enquiry codes - 118XXX.
File sabc_de.txt has been renamed s1_code.txt.
File sabc_def.txt has been renamed s8f_code.txt.
A new file s1f_code.txt has been added which lists Geographic Type A Conservation Areas at 1k number level.
12 13/11/06 The numbering files no longer have separate downloads for s1 Geographic & s8 Non-Geographic 1k allocations. These are now included in the s1 & s8 downloads.
13 28/07/10 The sabcde file has been split into 7 separate documents rather than 4

Ofcom - the Office of Communications