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References
- ↑ Gillett, Sharon E.; Vogelsang, Ingo (1999-09-01). Competition, Regulation, and Convergence: Current Trends in Telecommunications Policy Research. Routledge. ISBN 9781135661861.
- 1 2 3 Director General of Telecommunications (2003-03-19). "Proposals to publish a National Telephone Numbering Plan : Appendix A : Geographic Area Codes" (PDF). Oftel. Office of Telecommunications. Retrieved 2011-01-11.
- 1 2 Erdunast, Howard (2003-03-24). "BT'S response to the consultation by Oftel on proposals to publish a National Telephone Numbering Plan" (PDF). BT. British Telecommunications PLC. Retrieved 2011-01-11.
- 1 2 C&W (2003-05-05). "Consultation on the proposed National Telephone Numbering Plan - Response from Cable & Wireless" (PDF). Cable and Wireless. Retrieved 2011-01-11.
- ↑ Director General of Telecommunications (2003-07-09). "The National Telephone Numbering Plan : Appendix A : Geographic Area Codes" (PDF). Oftel. Office of Telecommunications. Retrieved 2011-01-11.
- ↑ Director General of Telecommunications (2003-07-22). "The National Telephone Numbering Plan : Appendix A : Geographic Area Codes (revised)" (PDF). Oftel. Office of Telecommunications. Retrieved 2011-01-11.
- ↑ Accounts, Great Britain: Parliament: House of Commons: Committee of Public (2011-02-10). Ofcom: the effectiveness of converged regulation, twentieth report of session 2010-11, report, together with formal minutes, oral and written evidence. The Stationery Office. ISBN 9780215556363.
- 1 2 Ofcom. "National Telephone Numbering Plan". Office of Communications. Archived from the original on 2014-04-06. Retrieved 2011-01-11.
- 1 2 Ofcom. "Data download - SABC". Office of Communications. Retrieved 2011-01-11.
- ↑ Ofcom (2004-05-05). "Data download - README". Office of Communications. Retrieved 2011-01-11.
- ↑ Lzaa, Mia (4 June 2010). "The introduction of 03 numbers". Flower Telecom. Retrieved 2017-07-14.
- ↑ Ofcom (2011-12-19). "Errata to National Telephone Numbering Plan, reissued 19 December 2011". Office of Communications. Retrieved 2011-12-20.
- ↑ Oftel (2003-03-03). "Download data of Telephone Numbers administered by Oftel (archive)". Office of Telecommunications. Retrieved 2011-01-11.
- 1 2 3 4 5 6 7 8 9 Ofcom (2009-09-09). "Telephone Area Codes Tool". Office of Communications. Archived from the original on 2014-03-29. Retrieved 2011-12-20.
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