Telephone numbers beginning with 013873 belong to the Langholm charge group.
The following numbers are local calls
to and from this charge group:
01228
014342
01450
01461
01576
01683
016977
016978
01750
The following numbers are regional calls
to and from this charge group:
013872
013874
013875
013876
013877
013878
014343
016973
016974
01835
01848
01864
01896
All other calls are national calls.
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