Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 253 [Rate centres in NPA 253] [Dial plan for NPA 253]

NXX: 233

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
253-233 A Tacoma WA STTLWA03X5X  6630 SPOK, INC. 674      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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