Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 531 [Rate centres in NPA 531] [Dial plan for NPA 531]

NXX: 344

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-344 A Fremont NE OMAHNENWXMX  6701 AERIAL COMMUNICATIONS, INC. 644      
531-344 0 Fremont NE   073H TELNYX LLC 644   2023-10-14   
531-344 1 Fremont NE   624H ONVOY SPECTRUM, LLC 644   2023-11-28   
531-344 2 Fremont NE   624H ONVOY SPECTRUM, LLC 644   2023-11-28   
531-344 3 Fremont NE   624H ONVOY SPECTRUM, LLC 644   2023-11-28   
531-344 4 Fremont NE   624H ONVOY SPECTRUM, LLC 644   2023-11-28   
531-344 5 Fremont NE   6701 AERIAL COMMUNICATIONS, INC. 644   2023-10-13   
531-344 6 Fremont NE   6701 AERIAL COMMUNICATIONS, INC. 644   2023-10-13   
531-344 7 Fremont NE   6701 AERIAL COMMUNICATIONS, INC. 644   2023-10-13   
531-344 8 Fremont NE   6701 AERIAL COMMUNICATIONS, INC. 644   2023-10-13   
531-344 9 Fremont NE   6701 AERIAL COMMUNICATIONS, INC. 644   2023-10-13   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.