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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: SHPTLAMA02Z

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
318-975 0 Zwolle LA 624H ONVOY SPECTRUM, LLC 486   2023-08-25   
318-983 A Winnfield LA 624H ONVOY SPECTRUM, LLC 486      
318-983 3 Winnfield LA 624H ONVOY SPECTRUM, LLC 486   2023-08-25   
318-989 0 Athens LA 624H ONVOY SPECTRUM, LLC 486   2023-07-14   
318-993 0 Tullos LA 624H ONVOY SPECTRUM, LLC 486   2023-07-21   
430-315 0 Vivian TX 624H ONVOY SPECTRUM, LLC 486   2023-08-07   

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Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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