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: MCMBILXDX9X

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
447-272 2 Ferris IL 224C ONVOY, LLC 977   2023-11-04   
447-437 A Basco IL 224C ONVOY, LLC 977      
447-437 4 Basco IL 224C ONVOY, LLC 977   2023-01-07   
447-437 7 Basco IL 224C ONVOY, LLC 977   2021-07-05   
447-440 A Bowen IL 224C ONVOY, LLC 977      
447-440 2 Bowen IL 224C ONVOY, LLC 977   2021-07-05   
447-441 A Elvaston IL 224C ONVOY, LLC 977      
447-441 1 Elvaston IL 224C ONVOY, LLC 977   2021-07-05   
447-457 A Sutter IL 224C ONVOY, LLC 977      
447-457 7 Sutter IL 224C ONVOY, LLC 977   2021-07-05   

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

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