Telephone numbers beginning with 01833 belong to the Barnard Castle charge group.
The following numbers are local calls
to and from this charge group:
01325
013884
013885
013886
013887
013888
014343
01748
017683
The following numbers are regional calls
to and from this charge group:
01207
01429
014346
015396
01609
01642
01661
01677
01740
01765
017682
017686
017688
01845
0191
01931
01969
All other calls are national calls.
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