Telephone numbers beginning with 01559 belong to the Llandyssul charge group.
The following numbers are local calls
to and from this charge group:
01239
01267
01545
01570
01994
The following numbers are regional calls
to and from this charge group:
01269
01348
014375
014377
014378
01550
01554
01558
01591
01639
01792
01834
01970
01974
All other calls are national calls.
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