Telephone numbers beginning with 017687 belong to the Keswick charge group.
The following numbers are local calls
to and from this charge group:
015394
016973
016974
017684
01900
019465
019466
019467
019468
The following numbers are regional calls
to and from this charge group:
01228
012294
012295
012296
012297
012298
01461
015395
015396
015397
015398
016977
016978
017682
017683
017686
017688
01931
All other calls are national calls.
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