Telephone numbers beginning with 01763 belong to the Royston charge group.
The following numbers are local calls
to and from this charge group:
01223
01279
01438
01462
01767
01799
01920
The following numbers are regional calls
to and from this charge group:
01234
01245
01277
01284
01353
01354
01371
01376
01440
01442
01480
01487
01525
01582
01638
01707
01708
01727
01787
01832
01908
01923
01933
01954
01992
All other calls are national calls.
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