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: 438

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
253-438 A Auburn WA   6529 T-MOBILE USA, INC. 674   2026-01-30   
253-438 4 Auburn WA   6529 T-MOBILE USA, INC. 674   2026-01-30   
253-438 5 Auburn WA   6529 T-MOBILE USA, INC. 674   2026-01-30   
253-438 6 Auburn WA   6529 T-MOBILE USA, INC. 674   2026-01-30   
253-438 7 Auburn WA   6529 T-MOBILE USA, INC. 674   2026-01-30   
253-438 8 Auburn WA   6529 T-MOBILE USA, INC. 674   2026-01-30   
253-438 9 Auburn WA   6529 T-MOBILE USA, INC. 674   2026-01-30   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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