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: 435 [Rate centres in NPA 435] [Dial plan for NPA 435]

NXX: 554

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
435-554 A Logan UT SLKDUTYI3MD  3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660      
435-554 0 Logan UT SLKDUTYI3MD  3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660   2005-12-24   
435-554 1 Logan UT SLKCUTMAX9X  117F BANDWIDTH.COM CLEC, LLC - UT 660   2011-02-20   
435-554 2 Logan UT DRPRUTKJ0MD  6529 T-MOBILE USA, INC. 660   2010-04-13   
435-554 3 Logan UT SLKCUTMAXKY  318J COMCAST IP PHONE, LLC 660   2006-07-27   
435-554 4 Logan UT DRPRUTKJ0MD  6529 T-MOBILE USA, INC. 660   2010-04-13   
435-554 5 Logan UT DRPRUTKJ0MD  6529 T-MOBILE USA, INC. 660   2010-04-13   
435-554 6 Logan UT DRPRUTKJ0MD  6529 T-MOBILE USA, INC. 660   2010-04-13   
435-554 7 Logan UT WVCYUT14DS1  871E ONVOY, LLC - UT 660   2006-11-06   
435-554 8 Logan UT SLKCUTMAX9X  117F BANDWIDTH.COM CLEC, LLC - UT 660   2008-11-29   
435-554 9 Logan UT DRPRUTKJ0MD  6529 T-MOBILE USA, INC. 660   2010-04-13   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.