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: 574 [Rate centres in NPA 574] [Dial plan for NPA 574]

NXX: 301

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
574-301 A Bremen IN PLMOINXAX5X  6529 T-MOBILE USA, INC. 332      
574-301 0 Bremen IN   4117 FBN INDIANA, INC. - IN 332   2004-04-11   
574-301 1 Bremen IN   105F BANDWIDTH.COM CLEC, LLC - IN 332   2015-03-02   
574-301 2 Bremen IN   6529 T-MOBILE USA, INC. 332   2013-11-12   
574-301 3 Bremen IN   105F BANDWIDTH.COM CLEC, LLC - IN 332   2017-06-11   
574-301 4 Bremen IN   105F BANDWIDTH.COM CLEC, LLC - IN 332   2017-11-09   
574-301 5 Bremen IN   105F BANDWIDTH.COM CLEC, LLC - IN 332   2021-08-23   
574-301 6 Bremen IN   7314 TELEPORT COMMUNICATIONS AMERICA, LLC - IN 332   2017-01-05   
574-301 7 Bremen IN   105F BANDWIDTH.COM CLEC, LLC - IN 332   2022-01-01   
574-301 8 Bremen IN   073H TELNYX LLC 332   2020-06-11   
574-301 9 Bremen IN   6529 T-MOBILE USA, INC. 332   2003-05-23   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.