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: 600

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-600 A Omaha NE OMAHNE16X9X  710A ALLO COMMUNICATIONS, LLC - NE 644      
531-600 0 Omaha NE OMAHNENWXTX  995E BANDWIDTH.COM CLEC, LLC - NE 644   2015-05-10   
531-600 1 Omaha NE OMAHNENWXTX  995E BANDWIDTH.COM CLEC, LLC - NE 644   2015-05-10   
531-600 2 Omaha NE OMAHNENWXTX  995E BANDWIDTH.COM CLEC, LLC - NE 644   2015-05-10   
531-600 3 Omaha NE OMAHNENWXTX  995E BANDWIDTH.COM CLEC, LLC - NE 644   2015-05-10   
531-600 4 Omaha NE OMAHNENWYMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 644   2015-07-10   
531-600 5 Omaha NE BLLVNEBL5MD  3233 LEVEL 3 COMMUNICATIONS, LLC - NE 644   2015-08-16   
531-600 6 Omaha NE OMAHNENWXGY  318J COMCAST IP PHONE, LLC 644   2015-09-07   
531-600 7 Omaha NE OMAHNE16X9X  710A ALLO COMMUNICATIONS, LLC - NE 644   2015-05-04   
531-600 8 Omaha NE OMAHNENWXTX  995E BANDWIDTH.COM CLEC, LLC - NE 644   2015-05-10   
531-600 9 Omaha NE OMAHNENWXTX  995E BANDWIDTH.COM CLEC, LLC - NE 644   2015-05-10   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.