Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 515 [Rate centres in NPA 515] [Dial plan for NPA 515]

NXX: 307

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
515-307 A Williams IA DESMIADTX7X  751F MCC TELEPHONY OF IOWA, LLC - IA 632      
515-307 1 Williams IA DESMIADTX7X  751F MCC TELEPHONY OF IOWA, LLC - IA 632   2023-07-10   
515-307 3 Williams IA DESMIADTX1X  624H ONVOY SPECTRUM, LLC 632   2024-12-19   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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