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: 237

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-237 A Pender NE OMAHNENWXPX  549E ONVOY, LLC - NE 644      
531-237 0 Pender NE OMAKNEYW0MD  073H TELNYX LLC 644   2019-12-01   
531-237 1 Pender NE OMAHNENWXCY  5807 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 644   2022-08-12   
531-237 2 Pender NE OMAHNENWXPX  549E ONVOY, LLC - NE 644   2020-11-16   
531-237 4 Pender NE OMAHNENWXPX  549E ONVOY, LLC - NE 644   2021-04-12   
531-237 5 Pender NE OMAHNENWXPX  549E ONVOY, LLC - NE 644   2019-10-21   
531-237 6 Pender NE OMAHNENWXPX  549E ONVOY, LLC - NE 644   2019-10-21   
531-237 7 Pender NE OMAHNENWXPX  549E ONVOY, LLC - NE 644   2021-03-13   
531-237 8 Pender NE OMAHNENWXPX  549E ONVOY, LLC - NE 644   2021-03-13   
531-237 9 Pender NE OMAKNEYW1MD  939H COMMIO, LLC 644   2024-02-12   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.