Section 1 -T h e   B  I  G   N U M B E R (S)
UK Code & Number Changes

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As you are probably aware, the demand for telephone numbers (for use with faxes, mobiles, ISDN, switchboards, freephone, information services and PC use) has never been greater. To keep pace with the growth, a major restructuring of  codes and existing numbers is necessary...

02

The 6 Cities Code & Number Changes

02

1st June 1999

Parallel running begins for National Numbers only

22nd April 2000

Old Local Numbers will only work will old National Codes

August-October 2000

Phased withdrawal of old codes and numbers.

City

Existing Formats

New Codes

(0171) 123 4567

(020) 7123 4567

(0181) 123 4567

(020) 8123 4567

(01705) 123456

(023) 9212 3456

(01703) 123456

(023) 8012 3456

(01203) 123456

(024) 7612 3456

(01222) 123456

(029) 2012 3456

NORTHERN IRELAND e.g. Belfast (01232) 123456 becomes (028) 9012 3456
N.B All codes in N.I. are changing, Belfast is just one example.
All numbers shown are illustrative only.

After the end of parallel running on 14th October 2000 London once again has a single code.

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