Telephone numbers beginning with 01609 belong to the Northallerton charge group.
The following numbers are local calls
to and from this charge group:
01325
01439
01642
01677
01748
01845
The following numbers are regional calls
to and from this charge group:
01287
01347
013884
013886
013887
013888
014232
014233
014235
014236
014237
014238
01429
01653
01740
01751
01765
01833
01904
0191 (numbers beginning 3)
01937
01943
01947
01969
All other calls are national calls.
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