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.

NPA: 404 [Rate centres in NPA 404] [Dial plan for NPA 404]

NXX: 537

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
404-537 A Atlanta GA ATLNGAQSDS8  067D ONVOY, LLC - GA 438   2025-02-02   
404-537 0 Atlanta GA   067D ONVOY, LLC - GA 438   2022-05-22   
404-537 1 Atlanta GA   6116 LEVEL 3 COMMUNICATIONS, LLC - GA 438   2008-07-01   
404-537 2 Atlanta GA   6116 LEVEL 3 COMMUNICATIONS, LLC - GA 438   2008-07-02   
404-537 3 Atlanta GA   6116 LEVEL 3 COMMUNICATIONS, LLC - GA 438   2008-07-17   
404-537 4 Atlanta GA   067D ONVOY, LLC - GA 438   2009-01-17   
404-537 5 Atlanta GA   067D ONVOY, LLC - GA 438   2009-01-17   
404-537 6 Atlanta GA   067D ONVOY, LLC - GA 438   2025-03-02   
404-537 7 Atlanta GA   067D ONVOY, LLC - GA 438   2025-03-02   
404-537 8 Atlanta GA   067D ONVOY, LLC - GA 438   2025-03-02   
404-537 9 Atlanta GA   067D ONVOY, LLC - GA 438   2025-03-02   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.