Telephone numbers beginning with 015042, 015043, 015044, 015046, or 015048 belong to the Londonderry charge group.
The following numbers are local calls
to and from this charge group:
015047
016626
and numbers in Eire beginning 0744 0745 0747 0748 077.
The following numbers are regional calls
to and from this charge group:
012653
012654
012655
012656
012658
012665
016482
016483
016484
016485
016486
016487
016488
016622
016627
016628
and numbers in Eire beginning 0742 0743 0746.
All other calls are national calls.
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