The UK Public Switched Telephone Network is divided up by area into National Number Groups (NNG's), and then further divided up into dialling codes.
The structure of UK telephone numbers is a leading zero (replaced with +44 for international calls from outside the UK) followed by the NNG — a 2, 3, 4 or 5 digit dialling code (digits SA in the example below) to different geographic areas of the UK.
e.g.
- Telephone number (020) 7811 8055 is part of the "London Area" and so has NNG 2078:
| 0 | S | A | B | C | D | E | F | G | H | I |
|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 2 | 0 | 7 | 8 | 1 | 1 | 8 | 0 | 5 | 5 |
Famous quotes containing the words national, number and/or group:
“Not one of our national officers ever has had a dollar of salary. I retire on full pay!”
—Susan B. Anthony (1820–1906)
“The best number for a dinner party is two—myself and a dam’ good head waiter.”
—Nubar Gulbenkian (1896–1972)
“Caprice, independence and rebellion, which are opposed to the social order, are essential to the good health of an ethnic group. We shall measure the good health of this group by the number of its delinquents. Nothing is more immobilizing than the spirit of deference.”
—Jean Dubuffet (1901–1985)