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: 253 [Rate centres in NPA 253] [Dial plan for NPA 253]

NXX: 375

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
253-375 A Graham WA STTLWANEDS0  7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 674      
253-375 0 Graham WA STTLWANEDS0  7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 674      
253-375 1 Graham WA STTLWAWBDS1  483E ONVOY, LLC - WA 674   2007-04-07   
253-375 2 Graham WA TACMWAFA2MD  6529 T-MOBILE USA, INC. 674   2004-07-06   
253-375 3 Graham WA TACMWAFA2MD  6529 T-MOBILE USA, INC. 674   2004-07-06   
253-375 4 Graham WA TACNWADNCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 674   2019-02-22   
253-375 5 Graham WA TACNWADNCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 674   2018-02-21   
253-375 6 Graham WA STTLWA03X1X  318J COMCAST IP PHONE, LLC 674   2006-09-14   
253-375 7 Graham WA STTLWA03X1X  318J COMCAST IP PHONE, LLC 674   2006-09-14   
253-375 8 Graham WA STTLWAWBX7Z  006F BANDWIDTH.COM CLEC, LLC - WA 674   2013-11-11   
253-375 9 Graham WA TACNWADNCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 674   2017-10-16   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.