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: 356

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
330-356 A Alliance OH AKRNOH25XRZ  6529 T-MOBILE USA, INC. 325      
330-356 0 Alliance OH   6529 T-MOBILE USA, INC. 325      
330-356 1 Alliance OH   6529 T-MOBILE USA, INC. 325   2008-07-12   
330-356 2 Alliance OH   6529 T-MOBILE USA, INC. 325   2009-03-06   
330-356 3 Alliance OH   6529 T-MOBILE USA, INC. 325   2009-11-06   
330-356 4 Alliance OH   6529 T-MOBILE USA, INC. 325   2009-11-06   
330-356 5 Alliance OH   001F BANDWIDTH.COM CLEC, LLC - OH 325   2011-10-21   
330-356 6 Alliance OH   6529 T-MOBILE USA, INC. 325   2014-07-02   
330-356 7 Alliance OH   464C ONVOY, LLC - OH 325   2013-04-18   
330-356 8 Alliance OH   001F BANDWIDTH.COM CLEC, LLC - OH 325   2009-01-04   
330-356 9 Alliance OH   6529 T-MOBILE USA, INC. 325      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.