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: 510

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
425-510 A Halls Lake WA STTLWA03X1X  318J COMCAST IP PHONE, LLC 674      
425-510 0 Halls Lake WA STTLWAWBDS1  483E ONVOY, LLC - WA 674   2021-02-15   
425-510 1 Halls Lake WA STTLWA03X1X  318J COMCAST IP PHONE, LLC 674   2020-10-31   
425-510 2 Halls Lake WA STTLWA03X1X  318J COMCAST IP PHONE, LLC 674   2020-10-30   
425-510 3 Halls Lake WA STTLWA03X1X  318J COMCAST IP PHONE, LLC 674   2020-10-31   
425-510 4 Halls Lake WA STTLWA03X1X  318J COMCAST IP PHONE, LLC 674   2020-10-31   
425-510 5 Halls Lake WA STTLWAWBDS1  483E ONVOY, LLC - WA 674   2020-11-16   
425-510 6 Halls Lake WA STTLWAWBDS1  483E ONVOY, LLC - WA 674   2020-11-16   
425-510 7 Halls Lake WA STTLWAWBDS1  483E ONVOY, LLC - WA 674   2021-02-15   
425-510 8 Halls Lake WA BOTHWAAK3MD  6529 T-MOBILE USA, INC. 674   2022-08-01   
425-510 9 Halls Lake WA BOTHWAAK3MD  6529 T-MOBILE USA, INC. 674   2022-08-01   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.