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: 737

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
620-737 A Buffalo KS WCHTKSTPXMD  516J TON80 COMMUNICATIONS, LLC 532      
620-737 0 Buffalo KS WCHTKSBRXPZ  624H ONVOY SPECTRUM, LLC 532   2024-04-05   
620-737 7 Buffalo KS   145J TERRA NOVA TELECOM INC. 532   2025-05-22   
620-737 8 Buffalo KS WCHTKSTPXMD  516J TON80 COMMUNICATIONS, LLC 532   2022-04-21   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.