Download numbering data
Cyhoeddwyd: 13 Mawrth 2024
Diweddarwyd diwethaf: 22 Hydref 2024
We publish data on which UK telephone numbers are available for allocation or are allocated, and lists of codes for use in number porting and other administrative tasks.
Dyfodol rhifau ffôn - Datganiad ar rannu refeniw
Cyhoeddwyd: 1 Rhagfyr 2023
Diweddarwyd diwethaf: 11 Hydref 2024
Mae’r ymgynghoriad hwn yn rhan o’n hadolygiad parhaus o rifau ffôn (Adolygiad Dyfodol Rhifau).
Telecoms numbering
Cyhoeddwyd: 28 Ebrill 2010
Diweddarwyd diwethaf: 11 Hydref 2024
This section provides information about UK telephone numbers, and allows communications providers to apply for telephone numbers from the National Numbering Plan.
Guidance on the provision of Calling Line Identification facilities and other related services
Cyhoeddwyd: 26 Ebrill 2018
Diweddarwyd diwethaf: 6 Medi 2024
Guidelines for the provision of Calling Line Identification Facilities and other related services over Electronic Communications Networks Version 2
ICSTIS complaint regarding failure of Talkline Communications Ltd to comply with ICSTIS Directions
Cyhoeddwyd: 4 Tachwedd 2005
Diweddarwyd diwethaf: 8 Mawrth 2024
Investigation into GW Telecom Limited (“Gateway”) concerning its compliance with its obligations relating to number portability
Cyhoeddwyd: 5 Ebrill 2018
Diweddarwyd diwethaf: 5 Mawrth 2024
Ofcom’s investigation will examine whether there are reasonable grounds for believing that Gateway has failed to comply with its obligations under GC18.1, GC18.3 and/or GC18.5.
Own-initiative investigation into Barritel’s compliance with GC17 and the National Telephone Numbering Plan
Cyhoeddwyd: 13 Chwefror 2019
Diweddarwyd diwethaf: 22 Chwefror 2024
On 14 September 2017 Ofcom opened an investigation into Barritel Limited’s “0800 Wizard” service and its compliance with General Condition 17 (GC17) and the National Telephone Numbering Plan (the ‘NTNP’).
Own-initiative investigation into Barritec’s compliance with GC17 and the National Telephone Numbering Plan
Cyhoeddwyd: 20 Hydref 2017
Diweddarwyd diwethaf: 22 Chwefror 2024
On 14 September 2017 Ofcom opened an investigation into Barritec Limited’s “Cash for Calls” service and its compliance with General Condition 17 (GC17) and the National Telephone Numbering Plan (the ‘NTNP’).
Canllaw i gostau galwadau
Cyhoeddwyd: 14 Chwefror 2023
Diweddarwyd diwethaf: 8 Awst 2023
Dysgwch faint mae’n ei gostio i ffonio rhifau gwahanol.
Diogelu blychau ffôn hanfodol
Cyhoeddwyd: 8 Awst 2023
Gall blychau ffôn cyhoeddus ddarparu rhwyd ddiogelwch i bobl heb fynediad at linell dir neu ffôn symudol sy'n gweithio. O dan reolau Ofcom, mae miloedd o flychau ffôn hanfodol wedi'u diogelu rhag cael eu dileu.