Local Calling Guide

Area code/prefix search

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NPA: 309 [Rate centres in NPA 309] [Dial plan for NPA 309]

NXX: 631

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-631 A Rock Island IL DVNPIA80XPX  6529 T-MOBILE USA, INC. 634      

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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