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: 402 [Rate centres in NPA 402] [Dial plan for NPA 402]

NXX: 357

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
402-357 A Wynot-Fordyce-St Helena NE WYNTNEXCRS1  1577 GREAT PLAINS COMMUNICATIONS, INC. 644      
402-357 2 Wynot-Fordyce-St Helena NE WYNTNEXCRS1  1577 GREAT PLAINS COMMUNICATIONS, INC. 644      
402-357 3 Wynot-Fordyce-St Helena NE WYNTNEXCRS1  1577 GREAT PLAINS COMMUNICATIONS, INC. 644      
402-357 7 Wynot-Fordyce-St Helena NE   145J TERRA NOVA TELECOM INC. 644   2025-07-18   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.