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: 334 [Rate centres in NPA 334] [Dial plan for NPA 334]

NXX: 577

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
334-577 A Eclectic AL MTGMALMTX9Z  5255 LEVEL 3 COMMUNICATIONS, LLC - AL 478      
334-577 0 Eclectic AL   604E ONVOY, LLC - AL 478   2019-03-11   
334-577 1 Eclectic AL   939H COMMIO, LLC 478   2023-08-17   
334-577 2 Eclectic AL   939H COMMIO, LLC 478   2023-08-17   
334-577 3 Eclectic AL   939H COMMIO, LLC 478   2023-08-17   
334-577 4 Eclectic AL   5255 LEVEL 3 COMMUNICATIONS, LLC - AL 478      
334-577 5 Eclectic AL   145J TERRA NOVA TELECOM INC. 478   2025-07-31   
334-577 6 Eclectic AL   8271 TELEPORT COMMUNICATIONS AMERICA, LLC - AL 478   2020-12-18   
334-577 7 Eclectic AL   965H FRACTEL, LLC 478   2020-10-18   
334-577 8 Eclectic AL   939H COMMIO, LLC 478   2023-08-17   
334-577 9 Eclectic AL   939H COMMIO, LLC 478   2023-08-17   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.