Telephone numbers beginning with 01997 belong to the Strathpeffer charge group.
The following numbers are local calls
to and from this charge group:
01349
01445
01463
01854
01863
The following numbers are regional calls
to and from this charge group:
01309
01320
01381
01408
01456
01549
01667
01808
01862
All other calls are national calls.
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