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.

Logan, UT

<< 1 2 3 4 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
435-363 A SLKDUTYI3MD  3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660      
435-363 0   3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660      
435-363 1   3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660      
435-363 2   3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660   2008-01-31   
435-363 3   3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660   2008-01-31   
435-363 4   3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660      
435-363 5   6529 T-MOBILE USA, INC. 660   2008-07-21   
435-363 6   6010 NEW CINGULAR WIRELESS PCS, LLC 660   2008-07-24   
435-363 7   871E ONVOY, LLC - UT 660   2008-06-14   
435-363 8   145J TERRA NOVA TELECOM INC. 660   2025-02-14   
435-363 9   117F BANDWIDTH.COM CLEC, LLC - UT 660   2010-06-25   
435-368 A   871E ONVOY, LLC - UT 660   2025-11-09   
435-368 0   871E ONVOY, LLC - UT 660   2025-11-09   
435-374 A DRPRUTKJ0MD  6529 T-MOBILE USA, INC. 660      
435-374 0   716D VERACITY COMMUNICATIONS, INC. - UT 660   2009-04-23   
435-374 1   6529 T-MOBILE USA, INC. 660   2009-11-07   
435-374 2   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-374 3   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-374 4   871E ONVOY, LLC - UT 660   2008-10-24   
435-374 5   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-374 6   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-374 7   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-374 8   6529 T-MOBILE USA, INC. 660   2007-12-09   
435-374 9   6529 T-MOBILE USA, INC. 660   2007-12-09   
435-512 A DRPRUTKJ0MD  6529 T-MOBILE USA, INC. 660      
435-514 A WVCYUTBXDS0  7530 TELEPORT COMMUNICATIONS AMERICA, LLC - UT 660      
435-514 1   871E ONVOY, LLC - UT 660   2019-09-06   
435-514 2   871E ONVOY, LLC - UT 660   2019-11-07   
435-514 3   871E ONVOY, LLC - UT 660   2019-09-06   
435-514 5   871E ONVOY, LLC - UT 660   2019-11-07   
435-514 6   7530 TELEPORT COMMUNICATIONS AMERICA, LLC - UT 660      
435-514 7   7530 TELEPORT COMMUNICATIONS AMERICA, LLC - UT 660      
435-514 8   7530 TELEPORT COMMUNICATIONS AMERICA, LLC - UT 660      
435-514 9   7530 TELEPORT COMMUNICATIONS AMERICA, LLC - UT 660      
435-534 A WVCYUT14DS1  871E ONVOY, LLC - UT 660      
435-534 0   073H TELNYX LLC 660   2021-02-14   
435-534 1   6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2022-09-05   
435-534 2   624H ONVOY SPECTRUM, LLC 660   2025-05-16   
435-534 3   871E ONVOY, LLC - UT 660   2021-01-07   
435-534 4   871E ONVOY, LLC - UT 660   2021-01-07   
435-534 5   871E ONVOY, LLC - UT 660   2021-01-07   
435-534 6   871E ONVOY, LLC - UT 660   2021-01-07   
435-534 7   871E ONVOY, LLC - UT 660   2023-08-11   
435-534 8   197D VONAGE AMERICA LLC 660   2021-06-10   
435-534 9   197D VONAGE AMERICA LLC 660   2021-06-10   
435-535 A SLKDUTYI3MD  3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660      
435-535 0   3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660      
435-535 1   117F BANDWIDTH.COM CLEC, LLC - UT 660   2008-11-29   
435-535 2   3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660   2008-04-28   
435-535 3   318J COMCAST IP PHONE, LLC 660   2006-07-27   
435-535 4   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-535 5   6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2009-10-10   
435-535 6   6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2010-03-11   
435-535 7   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-535 8   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-535 9   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-554 A SLKDUTYI3MD  3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660      
435-554 0   3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660   2005-12-24   
435-554 1   117F BANDWIDTH.COM CLEC, LLC - UT 660   2011-02-20   
435-554 2   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-554 3   318J COMCAST IP PHONE, LLC 660   2006-07-27   
435-554 4   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-554 5   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-554 6   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-554 7   871E ONVOY, LLC - UT 660   2006-11-06   
435-554 8   117F BANDWIDTH.COM CLEC, LLC - UT 660   2008-11-29   
435-554 9   6529 T-MOBILE USA, INC. 660   2010-04-13   
435-557 A SLKCUTMAX9X  117F BANDWIDTH.COM CLEC, LLC - UT 660      
435-557 0   117F BANDWIDTH.COM CLEC, LLC - UT 660   2015-08-02   
435-557 1   6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2016-06-30   
435-557 2   6010 NEW CINGULAR WIRELESS PCS, LLC 660   2018-11-04   
435-557 3   871E ONVOY, LLC - UT 660   2016-03-03   
435-557 4   871E ONVOY, LLC - UT 660   2016-03-03   
435-557 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 660   2016-09-16   
435-557 6   6010 NEW CINGULAR WIRELESS PCS, LLC 660   2015-09-22   
435-557 7   508J CENTURYLINK COMMUNICATIONS, LLC 660   2017-04-05   
435-557 8   526H PEERLESS NETWORK OF UTAH, LLC - UT 660   2019-06-27   
435-557 9   6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2017-01-18   
435-563 A SMFDUTMARS1  9636 QWEST CORPORATION 660      
435-603 A WVCYUTBXDS0  7530 TELEPORT COMMUNICATIONS AMERICA, LLC - UT 660      
435-603 0   6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2020-06-29   
435-603 1   7530 TELEPORT COMMUNICATIONS AMERICA, LLC - UT 660      
435-603 2   7530 TELEPORT COMMUNICATIONS AMERICA, LLC - UT 660      
435-603 6   6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2021-10-17   
435-603 7   7530 TELEPORT COMMUNICATIONS AMERICA, LLC - UT 660      
435-603 8   7530 TELEPORT COMMUNICATIONS AMERICA, LLC - UT 660      
435-603 9   7530 TELEPORT COMMUNICATIONS AMERICA, LLC - UT 660      
435-713 A LOGNUTMADS0  9636 QWEST CORPORATION 660      
435-713 0   9636 QWEST CORPORATION 660      
435-713 1   9636 QWEST CORPORATION 660      
435-713 2   9636 QWEST CORPORATION 660      
435-713 3   9636 QWEST CORPORATION 660      
435-713 4   9636 QWEST CORPORATION 660      
435-713 5   6529 T-MOBILE USA, INC. 660   2007-09-14   
435-713 6   9636 QWEST CORPORATION 660      
435-713 7   9636 QWEST CORPORATION 660      
435-713 8   9636 QWEST CORPORATION 660      
435-713 9   9636 QWEST CORPORATION 660      
435-716 A LOGNUTMADS0  9636 QWEST CORPORATION 660      
435-750 A LOGNUTMADS0  9636 QWEST CORPORATION 660      

<< 1 2 3 4 >>

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.