Telephone numbers beginning with 01277 belong to the Brentwood charge group.
The following numbers are local calls
to and from this charge group:
01245
01268
01279
01375
01708
01992
The following numbers are regional calls
to and from this charge group:
01206
01322
01371
01372
01376
01438
01440
01462
01474
01621
01622
01634
01689
01702
01707
01727
01732
01737
01763
01787
01795
01799
01883
01892
01920
01923
01932
01959
020
All other calls are national calls.
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