Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 425 [Rate centres in NPA 425] [Dial plan for NPA 425]

NXX: 660

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
425-660 A Maple Valley WA STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
425-660 0 Maple Valley WA   145J TERRA NOVA TELECOM INC. 674   2021-01-29   
425-660 1 Maple Valley WA   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2023-11-23   
425-660 2 Maple Valley WA   483E ONVOY, LLC - WA 674      
425-660 3 Maple Valley WA   483E ONVOY, LLC - WA 674      
425-660 4 Maple Valley WA   483E ONVOY, LLC - WA 674      
425-660 5 Maple Valley WA   483E ONVOY, LLC - WA 674      
425-660 6 Maple Valley WA   483E ONVOY, LLC - WA 674      
425-660 7 Maple Valley WA   483E ONVOY, LLC - WA 674      
425-660 8 Maple Valley WA   483E ONVOY, LLC - WA 674      
425-660 9 Maple Valley WA   006F BANDWIDTH.COM CLEC, LLC - WA 674   2005-03-10   

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

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