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: 228

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
435-228 A Tooele UT SLKDUTIT0MD  829J PAETEC ITEL, LLC 660      
435-228 0 Tooele UT   829J PAETEC ITEL, LLC 660      
435-228 1 Tooele UT   829J PAETEC ITEL, LLC 660      
435-228 2 Tooele UT   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 660   2004-08-16   
435-228 3 Tooele UT   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 660   2004-08-16   
435-228 4 Tooele UT   3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660   2004-06-03   
435-228 5 Tooele UT   117F BANDWIDTH.COM CLEC, LLC - UT 660   2014-06-23   
435-228 6 Tooele UT   318J COMCAST IP PHONE, LLC 660   2011-07-28   
435-228 7 Tooele UT   871E ONVOY, LLC - UT 660   2018-04-13   
435-228 8 Tooele UT   6529 T-MOBILE USA, INC. 660   2005-07-08   
435-228 9 Tooele UT   829J PAETEC ITEL, LLC 660      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.