64, so Stoneyford 8149 became 648149. Thus, Stoneyford became 0846. PhONEday "PhONEday", on 16 April 1995 meant the addition of the number '1' to every area code in the United Kingdom. 0846 therefore became 01846. The subscriber numbers were unchanged. Big Number Change The Big Number Change on 22 April 2000 was the introduction of eight-digit local numbers to areas of the country where there was a shortage of numbers under the six-digit/seven-digit system. Belfast's 01232 code was approaching its limit and with unavailability of a 011x area code, the decision was made to change the whole province to 028. Numbers in the 01846 area, which was deemed part of the 'Greater Belfast Area' were given the 92 prefix on the existing number. (01846) 651276 became (028) 9265 1276 (01846) 662214 became (028) 9266 2214 (01846) 648299 became (028) 9264 8299 Calling within the original 01846 area now meant the inclusion of '92' irrespective of whether the number was your exchange or not. However it did omit the need to include the area code when calling other areas of the province. Today Nowadays, with the expansion of the area, more local numbers have been introduced. Here is a list of first 4/5 digits of the local number and area it covers. 920x xxxx – Greater Lisburn (Recently introduced) 921x xxxx – Greater Lisburn (Recently introduced) 925x xxxx – Greater Lisburn (Recently introduced) 9261 xxxx – Moira and Upper/Lower Ballinderry 9262 1xxx to 9262 2xxx – Mazetown and Long Kesh 9262 8xxx to 9262 9xxx – Greater Lisburn 9263 0xxx to 9263 7xxx – Greater Lisburn 9263 8xxx to 9263 9xxx – Baillies Mills and Temple 9264 0xxx to 9264 7xxx – Greater Lisburn 9264 8xxx – Stoneyford 9265 xxxx – Aghalee, Aghagallon and Gawley's Gate. 9266 xxxx – Greater Lisburn 9267 xxxx – Greater Lisburn 9268 xxxx – Hillsborough, Culcavy and Annahilt 9269 xxxx – Dromore See also List of dialling codes in the United Kingdom Telecommunications in the United Kingdom Telephone numbering plan Lisburn City Council Big Number Change References External links UK Numbering Policy section of Ofcom's website UK National Telephone Numbering Plan (in PDF format) UK Future Numbering Plan from Ofcom's website UK phone information - now outdated UK phone numbering in the 1960s to 1990s Telephone numbers in the United Kingdom Lisburn Communications in Northern Ireland