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: 408 [Rate centres in NPA 408] [Dial plan for NPA 408]

NXX: 273

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
408-273 A San Jose: North DA CA SNJSCARMDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 722      
408-273 0 San Jose: North DA CA SNJSCARMDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 722      
408-273 1 San Jose: North DA CA SNJSCARMDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 722      
408-273 2 San Jose: North DA CA SNJSCARMDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 722      
408-273 3 San Jose: North DA CA HYWRCAMCDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 722      
408-273 4 San Jose: North DA CA SNJSCARMDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 722      
408-273 5 San Jose: North DA CA SNJSCARMDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 722      
408-273 6 San Jose: North DA CA SNJSCARMDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 722      
408-273 7 San Jose: North DA CA HYWRCAMCDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 722      
408-273 8 San Jose: North DA CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2006-02-23   
408-273 9 San Jose: North DA CA SNJSCARMDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 722      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.