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: 400

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
330-400 A Akron OH AKRNOH25XWY  7532 TELEPORT COMMUNICATIONS AMERICA, LLC - OH 325      
330-400 0 Akron OH   6529 T-MOBILE USA, INC. 325   2011-03-31   
330-400 1 Akron OH   6529 T-MOBILE USA, INC. 325   2011-08-05   
330-400 2 Akron OH   4863 LEVEL 3 COMMUNICATIONS, LLC - OH 325   2011-04-15   
330-400 3 Akron OH   4863 LEVEL 3 COMMUNICATIONS, LLC - OH 325   2011-07-31   
330-400 4 Akron OH   793K TWC IP ENABLED SERVICES, LLC 325   2011-07-22   
330-400 5 Akron OH   7532 TELEPORT COMMUNICATIONS AMERICA, LLC - OH 325   2011-02-27   
330-400 6 Akron OH   6529 T-MOBILE USA, INC. 325   2011-08-05   
330-400 7 Akron OH   6529 T-MOBILE USA, INC. 325   2011-08-05   
330-400 8 Akron OH   6529 T-MOBILE USA, INC. 325   2011-08-05   
330-400 9 Akron OH   6529 T-MOBILE USA, INC. 325   2011-04-16   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.