Telephone numbers beginning with 01685 belong to the Merthyr Tydfil charge group.
The following numbers are local calls
to and from this charge group:
01443
01495
01639
01874
The following numbers are regional calls
to and from this charge group:
01222
01269
01291
01446
01497
01544
01550
01554
01558
01591
01597
01600
01633
01656
01792
01873
01981
01982
All other calls are national calls.
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