Telephone numbers beginning with 01642 belong to the Middlesbrough charge group.
The following numbers are local calls
to and from this charge group:
01287
01325
01429
01439
01609
01740
01751
The following numbers are regional calls
to and from this charge group:
01207
01347
013884
013885
013886
013887
013888
014232
014233
01677
01748
01765
01833
01845
0191
01947
01969
All other calls are national calls.
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