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: 399

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
425-399 A Silver Lake WA STTLWAWBDS1  483E ONVOY, LLC - WA 674      
425-399 0 Silver Lake WA   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2015-05-21   
425-399 1 Silver Lake WA   5562 METROPCS, INC. 674   2015-06-21   
425-399 2 Silver Lake WA   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2015-11-23   
425-399 3 Silver Lake WA   5562 METROPCS, INC. 674   2016-07-21   
425-399 4 Silver Lake WA   5562 METROPCS, INC. 674   2016-02-18   
425-399 5 Silver Lake WA   483E ONVOY, LLC - WA 674   2017-10-08   
425-399 6 Silver Lake WA   5562 METROPCS, INC. 674   2017-01-08   
425-399 7 Silver Lake WA   483E ONVOY, LLC - WA 674   2016-03-03   
425-399 8 Silver Lake WA   483E ONVOY, LLC - WA 674   2019-08-06   
425-399 9 Silver Lake WA   321J HD CARRIER LLC 674   2016-05-21   

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

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