Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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   3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660   2005-12-24   
435-554 1 Logan UT   117F BANDWIDTH.COM CLEC, LLC - UT 660   2011-02-20   
435-554 2 Logan UT   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-554 3 Logan UT   318J COMCAST IP PHONE, LLC 660   2006-07-27   
435-554 4 Logan UT   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-554 5 Logan UT   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-554 6 Logan UT   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-554 7 Logan UT   871E ONVOY, LLC - UT 660   2006-11-06   
435-554 8 Logan UT   117F BANDWIDTH.COM CLEC, LLC - UT 660   2008-11-29   
435-554 9 Logan UT   6529 T-MOBILE USA, INC. 660   2010-04-13   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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