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: 428

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
425-428 A Issaquah WA STTLWA060MD  6529 T-MOBILE USA, INC. 674      
425-428 0 Issaquah WA   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2019-06-17   
425-428 1 Issaquah WA   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2019-06-17   
425-428 2 Issaquah WA   6529 T-MOBILE USA, INC. 674   2019-06-07   
425-428 3 Issaquah WA   6529 T-MOBILE USA, INC. 674   2019-06-07   
425-428 4 Issaquah WA   483E ONVOY, LLC - WA 674   2019-05-04   
425-428 5 Issaquah WA   483E ONVOY, LLC - WA 674   2019-05-04   
425-428 6 Issaquah WA   483E ONVOY, LLC - WA 674   2019-05-04   
425-428 7 Issaquah WA   6529 T-MOBILE USA, INC. 674   2019-04-14   
425-428 8 Issaquah WA   6529 T-MOBILE USA, INC. 674   2019-02-15   
425-428 9 Issaquah WA   6529 T-MOBILE USA, INC. 674   2019-01-11   

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

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