Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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NPA: 918 [Rate centres in NPA 918] [Dial plan for NPA 918]

NXX: 309

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
918-309 A Miami OK TULUOKSP1MD  6272 UNITED STATES CELLULAR - OK 538      
918-309 0 Miami OK   6272 UNITED STATES CELLULAR - OK 538      
918-309 1 Miami OK   409F ONVOY, LLC - OK 538   2023-08-06   
918-309 2 Miami OK   409F ONVOY, LLC - OK 538   2020-07-13   
918-309 3 Miami OK   409F ONVOY, LLC - OK 538   2023-10-01   
918-309 4 Miami OK   624H ONVOY SPECTRUM, LLC 538   2025-01-23   
918-309 5 Miami OK   409F ONVOY, LLC - OK 538   2018-03-19   
918-309 6 Miami OK   409F ONVOY, LLC - OK 538   2020-07-13   
918-309 7 Miami OK   508J CENTURYLINK COMMUNICATIONS, LLC 538   2017-02-16   
918-309 8 Miami OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 538   2024-12-19   
918-309 9 Miami OK   5813 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 538   2024-09-30   

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

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