Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 531 [Rate centres in NPA 531] [Dial plan for NPA 531]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-999 4 Omaha NE OMAHNENWXPX  549E ONVOY, LLC - NE 644   2019-06-08   
531-999 5 Omaha NE OMAHNENWXPX  549E ONVOY, LLC - NE 644   2019-06-08   
531-999 6 Omaha NE OMAHNENWXPX  549E ONVOY, LLC - NE 644   2019-06-08   
531-999 7 Omaha NE OMAHNENWXPX  549E ONVOY, LLC - NE 644   2019-06-08   
531-999 8 Omaha NE OMAHNENWXGY  318J COMCAST IP PHONE, LLC 644   2019-04-20   
531-999 9 Omaha NE   145J TERRA NOVA TELECOM INC. 644   2019-03-14   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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