Telephone numbers beginning with 01842 belong to the Thetford charge group.
The following numbers are local calls
to and from this charge group:
01284
01353
01359
01366
01638
01760
01953
The following numbers are regional calls
to and from this charge group:
01223
01328
01354
01362
01379
01440
01449
01485
01487
01508
01553
01603
01787
01799
01945
01954
01986
All other calls are national calls.
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