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: 424

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
253-424 A Auburn WA   6529 T-MOBILE USA, INC. 674   2025-08-15   
253-424 8 Auburn WA   6529 T-MOBILE USA, INC. 674   2025-08-15   
253-424 9 Auburn WA   6529 T-MOBILE USA, INC. 674   2025-08-15   

Last updated: Tue, 15 Jul 2025 18:46:49 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.