Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 605 [Rate centres in NPA 605] [Dial plan for NPA 605]

NXX: 585

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-585 A North Sioux City SD SXCYIA78X9X  6529 T-MOBILE USA, INC. 630      

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

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