Local Calling Guide

Area code/prefix search

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NPA: 281 [Rate centres in NPA 281] [Dial plan for NPA 281]

NXX: 350

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
281-350 A Spring EMS TX SPRNTXSODS0  9533 SOUTHWESTERN BELL 560      

Last updated: Tue, 07 Oct 2025 16:47:53 UTC

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