Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 509 [Rate centres in NPA 509] [Dial plan for NPA 509]

NXX: 604

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
509-604 A Richland WA SPKNWA01XDY  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 676   2024-12-08   
509-604 0 Richland WA SPKNWA01XDY  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 676   2024-06-17   
509-604 5 Richland WA   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 676   2025-10-16   
509-604 9 Richland WA   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 676   2025-06-20   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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