Telephone numbers beginning with 01206 belong to the Colchester charge group.
The following numbers are local calls
to and from this charge group:
01255
01376
01473
01621
01787
The following numbers are regional calls
to and from this charge group:
01245
01268
01277
01279
01284
01359
01371
01375
01379
01394
01440
01449
01638
01702
01728
01799
All other calls are national calls.
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