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: 317 [Rate centres in NPA 317] [Dial plan for NPA 317]

NXX: 520

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
317-520 A Brownsburg IN IPLWINRO6MD  4803 LEVEL 3 COMMUNICATIONS, LLC - IN 336      
317-520 0 Brownsburg IN   145J TERRA NOVA TELECOM INC. 336   2025-02-13   
317-520 1 Brownsburg IN IPLSIN01XNY  105F BANDWIDTH.COM CLEC, LLC - IN 336   2010-02-21   
317-520 2 Brownsburg IN IPLSIN01XNY  105F BANDWIDTH.COM CLEC, LLC - IN 336   2010-09-05   
317-520 3 Brownsburg IN IPLSIN01XNY  105F BANDWIDTH.COM CLEC, LLC - IN 336   2011-02-28   
317-520 4 Brownsburg IN IPLSIN01XNY  105F BANDWIDTH.COM CLEC, LLC - IN 336   2011-06-20   
317-520 5 Brownsburg IN IPLWIN75XIX  829J PAETEC ITEL, LLC 336   2011-05-22   
317-520 6 Brownsburg IN IPLUINWX3MD  5562 METROPCS, INC. 336   2017-10-29   
317-520 7 Brownsburg IN IPLWIN75DS5  097D ONVOY, LLC - IN 336   2014-10-07   
317-520 8 Brownsburg IN IPLWIN75DS5  097D ONVOY, LLC - IN 336   2014-10-07   
317-520 9 Brownsburg IN IPLWINRO6MD  4803 LEVEL 3 COMMUNICATIONS, LLC - IN 336   2011-08-13   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.