Telephone numbers beginning with 01228 belong to the Carlisle charge group.
The following numbers are local calls
to and from this charge group:
013873
01461
016973
016974
016977
016978
017682
017686
017688
The following numbers are regional calls
to and from this charge group:
013872
013874
013875
013876
013877
013878
014342
014343
014346
01576
017683
017684
017687
01900
01931
All other calls are national calls.
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