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: 509 [Rate centres in NPA 509] [Dial plan for NPA 509]

NXX: 253

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
509-253 A Harrington WA HRTNWAXARS0  2408 CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 676      
509-253 0 Harrington WA   483E ONVOY, LLC - WA 676   2023-03-30   
509-253 1 Harrington WA   483E ONVOY, LLC - WA 676   2017-09-15   
509-253 3 Harrington WA   483E ONVOY, LLC - WA 676   2021-06-27   
509-253 4 Harrington WA   2408 CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 676      
509-253 5 Harrington WA   483E ONVOY, LLC - WA 676   2021-11-20   
509-253 6 Harrington WA   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 676   2015-01-29   
509-253 7 Harrington WA   483E ONVOY, LLC - WA 676   2008-09-06   
509-253 8 Harrington WA   483E ONVOY, LLC - WA 676   2011-07-31   
509-253 9 Harrington WA   483E ONVOY, LLC - WA 676   2022-10-01   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.