Telephone numbers beginning with 01223 belong to the Cambridge charge group.
The following numbers are local calls
to and from this charge group:
01353
01440
01638
01763
01767
01799
01954
The following numbers are regional calls
to and from this charge group:
01234
01279
01284
01354
01359
01366
01371
01376
01438
01442
01462
01480
01487
01525
01582
01707
01727
01731
01733
01787
01832
01842
01920
01933
01945
01992
All other calls are national calls.
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