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: 401

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-401 A Omaha NE   7144 TELEPORT COMMUNICATIONS AMERICA, LLC - NE 644   2025-06-04   
531-401 0 Omaha NE   7144 TELEPORT COMMUNICATIONS AMERICA, LLC - NE 644   2025-06-04   
531-401 1 Omaha NE   7144 TELEPORT COMMUNICATIONS AMERICA, LLC - NE 644   2025-06-04   
531-401 2 Omaha NE   7144 TELEPORT COMMUNICATIONS AMERICA, LLC - NE 644   2025-06-04   
531-401 3 Omaha NE   7144 TELEPORT COMMUNICATIONS AMERICA, LLC - NE 644   2025-06-04   
531-401 4 Omaha NE   7144 TELEPORT COMMUNICATIONS AMERICA, LLC - NE 644   2025-06-04   
531-401 5 Omaha NE   7144 TELEPORT COMMUNICATIONS AMERICA, LLC - NE 644   2025-06-04   
531-401 6 Omaha NE   7144 TELEPORT COMMUNICATIONS AMERICA, LLC - NE 644   2025-06-04   
531-401 7 Omaha NE   7144 TELEPORT COMMUNICATIONS AMERICA, LLC - NE 644   2025-06-04   
531-401 8 Omaha NE   7144 TELEPORT COMMUNICATIONS AMERICA, LLC - NE 644   2025-06-04   
531-401 9 Omaha NE   7144 TELEPORT COMMUNICATIONS AMERICA, LLC - NE 644   2025-06-04   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.