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: 775 [Rate centres in NPA 775] [Dial plan for NPA 775]

NXX: 581

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
775-581 A Topaz Lake NV RENONV126MD  4805 LEVEL 3 COMMUNICATIONS, LLC - NV 720      
775-581 0 Topaz Lake NV RENONV126MD  4805 LEVEL 3 COMMUNICATIONS, LLC - NV 720      
775-581 3 Topaz Lake NV RENONV126MD  4805 LEVEL 3 COMMUNICATIONS, LLC - NV 720   2006-01-20   
775-581 4 Topaz Lake NV RENONV126MD  4805 LEVEL 3 COMMUNICATIONS, LLC - NV 720   2005-07-26   

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.