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: 620 [Rate centres in NPA 620] [Dial plan for NPA 620]

NXX: 558

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
620-558 A Riverton KS WCHTKSBRY0X  425J CSC WIRELESS, LLC 532      
620-558 0 Riverton KS WCHTKSBRY0X  425J CSC WIRELESS, LLC 532   2021-12-05   
620-558 1 Riverton KS WCHTKSTPOMD  939H COMMIO, LLC 532   2024-02-25   
620-558 8 Riverton KS WCHTKSBRXPZ  624H ONVOY SPECTRUM, LLC 532   2024-04-07   
620-558 9 Riverton KS WCHTKSBRX7Z  6532 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 532   2024-10-02   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.