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: JCSNMSCP67Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
601-350 A Naval Air Station MS 318J COMCAST IP PHONE, LLC 482      
601-449 A Briarwood MS 318J COMCAST IP PHONE, LLC 482      
601-637 A Toomsuba MS 318J COMCAST IP PHONE, LLC 482      
601-771 A Obadiah MS 318J COMCAST IP PHONE, LLC 482      
601-891 A Florence MS 318J COMCAST IP PHONE, LLC 482      
769-251 A Jackson MS 318J COMCAST IP PHONE, LLC 482      
769-300 A Madison MS 318J COMCAST IP PHONE, LLC 482      
769-306 A Vicksburg MS 318J COMCAST IP PHONE, LLC 482      
769-321 A Heidelberg MS 318J COMCAST IP PHONE, LLC 482      
769-400 A Duffee MS 318J COMCAST IP PHONE, LLC 482      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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