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: 366

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
253-366 A Tacoma WA STTLWAWBDS1  483E ONVOY, LLC - WA 674      
253-366 0 Tacoma WA   6529 T-MOBILE USA, INC. 674   2021-03-18   
253-366 1 Tacoma WA   6529 T-MOBILE USA, INC. 674   2021-03-18   
253-366 2 Tacoma WA   6529 T-MOBILE USA, INC. 674   2021-03-18   
253-366 3 Tacoma WA   6529 T-MOBILE USA, INC. 674   2021-04-10   
253-366 4 Tacoma WA   6529 T-MOBILE USA, INC. 674   2021-04-10   
253-366 5 Tacoma WA   483E ONVOY, LLC - WA 674   2021-03-04   
253-366 6 Tacoma WA   483E ONVOY, LLC - WA 674   2021-03-04   
253-366 7 Tacoma WA   483E ONVOY, LLC - WA 674   2021-03-04   
253-366 8 Tacoma WA   483E ONVOY, LLC - WA 674   2021-03-04   
253-366 9 Tacoma WA   159F PEERLESS NETWORK OF WASHINGTON, LLC - WA 674   2021-03-28   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.