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: SVNHGABS48Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
912-477 A Savannah GA 478J NUSO, LLC 440      
912-477 1 Savannah GA 478J NUSO, LLC 440   2020-10-27   
912-760 1 Savannah GA 478J NUSO, LLC 440   2023-12-26   
912-784 2 Savannah GA 478J NUSO, LLC 440   2024-08-04   
912-784 3 Savannah GA 478J NUSO, LLC 440   2024-08-04   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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