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: 633

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
620-633 A Lafontaine KS LFNTKSXARS0  1810 UNITED TEL OF EASTERN KANSAS DBA CENTURYLINK 532      
620-633 0 Lafontaine KS LFNTKSXARS0  1810 UNITED TEL OF EASTERN KANSAS DBA CENTURYLINK 532      
620-633 1 Lafontaine KS WCHTKSBRXPZ  624H ONVOY SPECTRUM, LLC 532   2024-04-07   
620-633 3 Lafontaine KS   145J TERRA NOVA TELECOM INC. 532   2025-05-28   
620-633 4 Lafontaine KS WCHTKSTPXMD  516J TON80 COMMUNICATIONS, LLC 532   2022-03-14   
620-633 5 Lafontaine KS LFNTKSXARS0  1810 UNITED TEL OF EASTERN KANSAS DBA CENTURYLINK 532      
620-633 9 Lafontaine KS WCHTKSBRXVY  508J CENTURYLINK COMMUNICATIONS, LLC 532   2014-03-15   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.