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: 570 [Rate centres in NPA 570] [Dial plan for NPA 570]

NXX: 521

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
570-521 A Jermyn PA BMBGPABLXQX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 232      
570-521 1 Jermyn PA   547E ONVOY, LLC - PA 232   2020-05-03   
570-521 2 Jermyn PA   002F BANDWIDTH.COM CLEC, LLC - PA 232   2017-06-02   
570-521 3 Jermyn PA   547E ONVOY, LLC - PA 232   2020-05-03   
570-521 4 Jermyn PA   318J COMCAST IP PHONE, LLC 232   2009-03-05   
570-521 5 Jermyn PA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 232      
570-521 6 Jermyn PA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 232      
570-521 7 Jermyn PA   508J CENTURYLINK COMMUNICATIONS, LLC 232   2016-01-28   
570-521 8 Jermyn PA   6921 LIMITLESS MOBILE, LLC 232   2018-01-02   
570-521 9 Jermyn PA   547E ONVOY, LLC - PA 232   2020-05-03   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.