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: 510

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
620-510 A Sublette KS SBLTKSORRL0  9533 SOUTHWESTERN BELL 532      
620-510 0 Sublette KS SBLTKSORRL0  9533 SOUTHWESTERN BELL 532      
620-510 1 Sublette KS WCHTKSMBX2X  2240 LEVEL 3 COMMUNICATIONS, LLC - KS 532      
620-510 2 Sublette KS WCHTKSBRDMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 532      
620-510 3 Sublette KS WCHTKSTPDS0  018H PEERLESS NETWORK OF KANSAS, LLC - KS 532      
620-510 4 Sublette KS WCHTKSBRX0X  205F ONVOY, LLC - KS 532      
620-510 5 Sublette KS WCHTKSBRTMD  516C AT&T CORP. 532      
620-510 6 Sublette KS WCHTKSBRX0X  205F ONVOY, LLC - KS 532      
620-510 7 Sublette KS WCHTKSBRXVY  508J CENTURYLINK COMMUNICATIONS, LLC 532      
620-510 8 Sublette KS WCHTKSTPNMD  073H TELNYX LLC 532      
620-510 9 Sublette KS WCHTKSBRDMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 532      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.