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: 556

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
918-556 A Tulsa OK   409F ONVOY, LLC - OK 538      
918-556 0 Tulsa OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 538   2026-05-23   
918-556 2 Tulsa OK   409F ONVOY, LLC - OK 538      
918-556 3 Tulsa OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 538   2026-05-23   
918-556 4 Tulsa OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 538   2026-05-23   
918-556 5 Tulsa OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 538   2026-05-23   
918-556 6 Tulsa OK   409F ONVOY, LLC - OK 538      
918-556 7 Tulsa OK   409F ONVOY, LLC - OK 538      
918-556 8 Tulsa OK   409F ONVOY, LLC - OK 538      
918-556 9 Tulsa OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 538   2026-05-23   

Last updated: Sat, 02 May 2026 12:20:53 UTC

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