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.

Oak Harbor, WA

<< 1 2 3 4

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
564-676 6 STTLWAWB24Z  516J TON80 COMMUNICATIONS, LLC 674   2021-06-09   
564-676 7 PLSBWAXXX0X  6010 NEW CINGULAR WIRELESS PCS, LLC 674   2022-08-28   
564-676 8 BOTHWAAK3MD  6529 T-MOBILE USA, INC. 674   2022-05-20   
564-676 9 BOTHWAAK3MD  6529 T-MOBILE USA, INC. 674   2022-05-20   

<< 1 2 3 4

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.