Number Allocation
With the introduction of the (020) area code, as part of the Big Number Change, subscriber numbers were changed from 7-digits (xxx xxxx) to 8-digits (xxxx xxxx). This allowed new ranges of numbers to be issued. Under the National Telephone Numbering Plan the code operates with the following sub-ranges:
| 020 | |
|---|---|
| 0xxx xxxx 1xxx xxxx | national dialling only |
| 2xxx xxxx | reserved for future use |
| 3xxx xxxx | new local numbers created by move to 020 (currently issued) |
| 4xxx xxxx 5xxx xxxx 6xxx xxxx | reserved for future use |
| 70xx xxxx 71xx xxxx | new local numbers created by move to 020 |
| 72xx xxxx 73xx xxxx 74xx xxxx 75xx xxxx 76xx xxxx 77xx xxxx 78xx xxxx 79xx xxxx | local numbers transferred from 0171 |
| 80xx xxxx 81xx xxxx | new local numbers created by move to 020 |
| 82xx xxxx 83xx xxxx 84xx xxxx 85xx xxxx 86xx xxxx 87xx xxxx 88xx xxxx 89xx xxxx | local numbers transferred from 0181 |
| 9xxx xxxx | reserved for future use |
In 2006 59% of numbers within the 020 code were allocated to BT. The area code is not subject to number conservation and the regulator Ofcom does not restrict the size of number blocks that are allocated.
Read more about this topic: 020
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