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: 330 [Rate centres in NPA 330] [Dial plan for NPA 330]

NXX: 406

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
330-406 A Youngstown OH YNTWOH78X9X  464C ONVOY, LLC - OH 322   2025-01-17   
330-406 0 Youngstown OH YNTWOH78X9X  464C ONVOY, LLC - OH 322   2008-02-24   
330-406 1 Youngstown OH   464C ONVOY, LLC - OH 322   2025-02-02   
330-406 2 Youngstown OH   464C ONVOY, LLC - OH 322   2025-05-09   
330-406 3 Youngstown OH   464C ONVOY, LLC - OH 322   2025-03-09   
330-406 4 Youngstown OH YNTWOH74X1X  145J TERRA NOVA TELECOM INC. 322   2025-01-03   
330-406 5 Youngstown OH   464C ONVOY, LLC - OH 322   2025-03-09   
330-406 6 Youngstown OH WRRNOHXAWMD  6025 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 322   2008-08-01   
330-406 7 Youngstown OH WRRNOHXAWMD  6025 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 322   2010-10-29   
330-406 8 Youngstown OH WRRNOHXAWMD  6025 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 322   2010-10-29   
330-406 9 Youngstown OH YNTWOH79FMD  001F BANDWIDTH.COM CLEC, LLC - OH 322   2011-10-01   

Last updated: Tue, 15 Jul 2025 18:46:49 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.