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: FRDRSDXARS3

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
605-329 A Frederick SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-329 0 Frederick SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-329 1 Frederick SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-329 2 Frederick SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-329 3 Frederick SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-329 4 Frederick SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-329 5 Frederick SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-329 6 Frederick SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-329 8 Frederick SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-329 9 Frederick SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      

Last updated: Sat, 15 Nov 2025 03:38:44 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.