Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 318 [Rate centres in NPA 318] [Dial plan for NPA 318]

NXX: 975

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
318-975 A Zwolle LA SHPTLAMA02Z  624H ONVOY SPECTRUM, LLC 486      
318-975 0 Zwolle LA SHPTLAMA02Z  624H ONVOY SPECTRUM, LLC 486   2023-08-25   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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