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: 394

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-394 A Ashland NE   5562 METROPCS, INC. 958   2025-05-23   
531-394 0 Ashland NE   6701 AERIAL COMMUNICATIONS, INC. 958   2026-01-14   
531-394 1 Ashland NE   6701 AERIAL COMMUNICATIONS, INC. 958   2026-01-14   
531-394 2 Ashland NE   793K TWC IP ENABLED SERVICES, LLC 958   2026-04-06   
531-394 9 Ashland NE   5562 METROPCS, INC. 958   2025-05-23   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.