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.

Last updated: Sun, 24 May 2015 22:14:35 UTC

NPA: 564 [Rate centres in NPA 564] [Dial plan for NPA 564]

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA Eff date Disc date Map
564-500 A Snohomish WA MONRWAXXDS1  4324 FRONTIER COMMUNICATIONS NORTHWEST INC. - WA [link] 674     map

Sponsored by: Callcentric - VoIP Internet phone service