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: 628 [Rate centres in NPA 628] [Dial plan for NPA 628]

NXX: 293

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
628-293 A Nicasio CA SNJUCACL4MD  939H COMMIO, LLC 722      
628-293 0 Nicasio CA SNJUCACL4MD  939H COMMIO, LLC 722      
628-293 1 Nicasio CA SNJUCACL4MD  939H COMMIO, LLC 722      
628-293 2 Nicasio CA SNJUCACL4MD  939H COMMIO, LLC 722      
628-293 3 Nicasio CA SNJUCACL4MD  939H COMMIO, LLC 722      
628-293 4 Nicasio CA SNJUCACL4MD  939H COMMIO, LLC 722      
628-293 5 Nicasio CA   6529 T-MOBILE USA, INC. 722      
628-293 8 Nicasio CA   624H ONVOY SPECTRUM, LLC 722      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.