Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 918 [Rate centres in NPA 918] [Dial plan for NPA 918]

NXX: 328

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
918-328 A Ralston OK TULSOKTBXHY  409F ONVOY, LLC - OK 538      
918-328 0 Ralston OK   409F ONVOY, LLC - OK 538   2021-04-26   
918-328 2 Ralston OK   384H PEERLESS NETWORK OF OKLAHOMA, LLC - OK 538   2016-03-04   
918-328 3 Ralston OK   409F ONVOY, LLC - OK 538   2016-09-29   
918-328 5 Ralston OK   409F ONVOY, LLC - OK 538   2021-10-21   
918-328 6 Ralston OK   809H CROSS CABLE TELEVISION, LLC - OK 538   2021-12-31   
918-328 8 Ralston OK   409F ONVOY, LLC - OK 538   2021-05-28   
918-328 9 Ralston OK   624H ONVOY SPECTRUM, LLC 538   2025-01-23   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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