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.
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NPA: 425 [Rate centres in NPA 425] [Dial plan for NPA 425]

NXX: 433

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
425-433 A Maple Valley WA MPVYWAMVDS0  9638 QWEST CORPORATION 674      
425-433 0 Maple Valley WA MPVYWAMVDS0  9638 QWEST CORPORATION 674      
425-433 1 Maple Valley WA MPVYWAMVDS0  9638 QWEST CORPORATION 674      
425-433 2 Maple Valley WA MPVYWAMVDS0  9638 QWEST CORPORATION 674      
425-433 3 Maple Valley WA STTNWAHODS6  7340 XO WASHINGTON, INC. 674   2005-10-01   
425-433 4 Maple Valley WA STTNWAHODS6  7340 XO WASHINGTON, INC. 674   2005-10-01   
425-433 5 Maple Valley WA STTNWAHODS6  7340 XO WASHINGTON, INC. 674   2005-10-01   
425-433 6 Maple Valley WA STTLWA03X1X  318J COMCAST IP PHONE, LLC 674   2010-09-19   
425-433 7 Maple Valley WA STTLWA03X1X  318J COMCAST IP PHONE, LLC 674   2015-08-10   
425-433 8 Maple Valley WA STTLWA03X1X  318J COMCAST IP PHONE, LLC 674   2007-09-01   
425-433 9 Maple Valley WA STTLWAWBXPZ  073H TELNYX LLC 674   2019-10-25   

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

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