054 area CodeFront-dial 054
Cell, page and personnel numbers
British numbers beginning with'07' are used for mobiles and private numbers. They are numbers assigned to a person or company that can forward an inbound call to any number. For example, a person could set their 070 number to forward a call to their work phones during the day, but establish a connection to their home phones in the mornings.
You can also use them to "hunt" a person by calling different telephones one after the other or both. The numbers 071, 072, 073, 074, 075, 07624, 077, 078 or 079 are for cell phone in Great Britain, the Channel Islands or the Isle of Man. Usually the first five or six numbers of a number are sufficient to indicate which enterprise gave the number first.
It is not a dependable indication of which operator they currently use because clients can keep their number when switching between telephone operators. UK cellophones are often covered by call charges or call bundle times. When you don't get a call to your cell or pocket money, or call at a daytime when you don't get free call, your carrier will bill you a default per minutes call plan.
UK-to-Guernsey, Jersey and Isle of Man are often billed at a higher tariff than UK to cell telephony in Guernsey, Jersey and the Isle of Man, despite very similar numbers. In addition, higher tariffs may be applied to certain smaller network or specialized service call. When you call an unknown number for the first reason, it is recommended that you verify the costs directly with your telephone operator before you call.
When cell telephones gradually entered the mains in the early 1990' and early 1980', they were put out with ten-digit numbers via various area codes. Most of the UK call number system was intended for fixed-line use, so cell telephones and other new features had to be plugged into the remaining free area.
The practical consequence was that you had to use a mix of replacement or regained dialling primitives that could not differ from the fixed area code. Such as 0389, 0422 and 0838 were fixed area code for Dumbarton, Halifax and Dalmally, but 0390, 0421 and 0839 were among the more than 30 area code for mobile phones. The country-wide change in numbering from "Phoneday" in 1994 brought all fixed-line dialling code to "01" and began a change from ten-digit to eleven-digit telephone numbers.
No immediate changes were made to the cell numbers, but tens of thousands of replacement numbers beginning with numbers 02 to 09 were made available for later use. The first 11-digit cell numbers in contemporary design were assigned to all new subscribers from 1997 onwards. Area 07 was divided between cell phones, pages and individual numbers, with the cell phones concentrating specifically on the number stacks from 077, 078 and 079.
Older numbers that did not start with 07 were definitively revoked in April 2001 after the customer switched to new numbers of the same value. Since then, all common cell telephones in the UK, the Channel Islands and the Isle of Man have had 11-digit numbers beginning with 07. Over the past few years, the market for cell telephones, wireless broadband and other equipment has continued to experience strong growth in this area.
As the adjacent area 076 is mainly reserved for paging, the Ofcom Regulatory Authority began to issue another 100 million numbers, beginning with 075. Since the 075 series was almost completely allocated to cell phone providers within only three years, further new numbers followed in 2009 from 074 - this series of 100 million numbers ran until the end of 2014.
Recently the numbers 073 and 071 have been added. Up to 800 million cell phones can currently be set up. To date, around 480 million of these have been spent on cell communications enterprises. While this should offer room for multiple mobiles per user, inefficiencies in numbering are likely to require Ofcom to either take action to cut back call volumes or to release new sets of numbers in the coming years.
Top: Allocation of cell numbers to cell phones, 1997 to 2014.