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: 425 [Rate centres in NPA 425] [Dial plan for NPA 425]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
425-321 A Silver Lake WA STTNWAHORS3  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
425-321 0 Silver Lake WA   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
425-321 2 Silver Lake WA   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2012-02-09   
425-321 4 Silver Lake WA   5562 METRO PCS, INC. 674   2014-03-21   
425-321 5 Silver Lake WA   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2006-04-13   
425-321 6 Silver Lake WA   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2015-12-05   
425-321 7 Silver Lake WA   5562 METRO PCS, INC. 674   2013-06-20   
425-321 8 Silver Lake WA   5562 METRO PCS, INC. 674   2013-07-18   
425-321 9 Silver Lake WA   5562 METRO PCS, INC. 674   2014-10-12   

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.