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: 304 [Rate centres in NPA 304] [Dial plan for NPA 304]

NXX: 901

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
304-901 A Martinsburg WV MRBGWVBUFMD  545B CITYNET WEST VIRGINIA, LLC - WV 240      
304-901 0 Martinsburg WV FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
304-901 1 Martinsburg WV FRDRMDFRXMD  9944 LEVEL 3 COMMUNICATIONS, LLC - WV 240      
304-901 2 Martinsburg WV FRDRMDFRXTX  318J COMCAST IP PHONE, LLC 240      
304-901 3 Martinsburg WV FRDRMDFRX7X  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 240      
304-901 4 Martinsburg WV FRDRMDFRXTX  318J COMCAST IP PHONE, LLC 240      
304-901 5 Martinsburg WV FRDRMDFRXTX  318J COMCAST IP PHONE, LLC 240      
304-901 6 Martinsburg WV FRDRMDFRKMD  5562 METROPCS, INC. 240      
304-901 7 Martinsburg WV MRBGWVBUFMD  545B CITYNET WEST VIRGINIA, LLC - WV 240      
304-901 8 Martinsburg WV FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
304-901 9 Martinsburg WV FRDRMDFRKMD  5562 METROPCS, INC. 240      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.