Telephone numbers beginning with 01638 belong to the Newmarket charge group.
The following numbers are local calls
to and from this charge group:
01223
01284
01353
01440
01842
The following numbers are regional calls
to and from this charge group:
01206
01279
01354
01359
01366
01371
01376
01379
01449
01462
01473
01480
01487
01760
01763
01767
01787
01799
01945
01953
01954
All other calls are national calls.
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