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: 319

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
570-319 A Clarks Summit PA SCTNPASCX4Y  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 232      
570-319 0 Clarks Summit PA   3806 CORE COMMUNICATIONS, INC. - PA 232   2009-03-24   
570-319 1 Clarks Summit PA SCTNPASCXMZ  318J COMCAST IP PHONE, LLC 232   2009-07-02   
570-319 2 Clarks Summit PA   829J PAETEC ITEL, LLC 232   2014-07-15   
570-319 3 Clarks Summit PA CLSMPAXCDS0  0161 COMMONWEALTH TELEPHONE COMPANY LLC 232   2006-08-18   
570-319 4 Clarks Summit PA SCTNPASCX4Y  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 232   2004-07-09   
570-319 5 Clarks Summit PA SCTNPASCXMZ  318J COMCAST IP PHONE, LLC 232   2013-11-19   
570-319 6 Clarks Summit PA SCTNPASCXMZ  318J COMCAST IP PHONE, LLC 232   2011-09-13   
570-319 7 Clarks Summit PA SCTNPASCX8Z  508J CENTURYLINK COMMUNICATIONS, LLC 232   2016-01-26   
570-319 8 Clarks Summit PA SCTNPASCXGY  7309 TELEPORT COMMUNICATIONS AMERICA, LLC - PA 232   2016-03-21   
570-319 9 Clarks Summit PA SCTNPASCXMZ  318J COMCAST IP PHONE, LLC 232   2013-11-25   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.