Telephone numbers beginning with 01558 belong to the Llandeilo charge group.
The following numbers are local calls
to and from this charge group:
01267
01269
01550
01570
01974
The following numbers are regional calls
to and from this charge group:
01239
014375
01443
01545
01554
01559
01591
01639
01656
01685
01792
01834
01874
01982
01994
All other calls are national calls.
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