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.

Switch: STTLWATA2MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
253-247 4 Auburn WA 073H TELNYX LLC 674   2022-06-20   
253-354 0 Tacoma WA 073H TELNYX LLC 674   2023-03-29   
253-354 1 Tacoma WA 073H TELNYX LLC 674   2023-07-10   
253-354 9 Tacoma WA 073H TELNYX LLC 674   2022-09-15   
253-357 A Tacoma WA 073H TELNYX LLC 674      
253-357 0 Tacoma WA 073H TELNYX LLC 674   2021-07-29   
253-378 0 Auburn WA 073H TELNYX LLC 674   2023-03-07   
425-380 0 Kirkland WA 073H TELNYX LLC 674   2022-06-10   
425-569 2 Maple Valley WA 073H TELNYX LLC 674   2022-06-10   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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