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.

Mount Vernon, WA

<< 1 2 3 4 5 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
360-420 8   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2005-11-09   
360-420 9   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2005-02-14   
360-421 A BOTHWAAK2MD  6529 T-MOBILE USA, INC. 674      
360-422 A BGLKWAXXRS0  4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-422 0   6529 T-MOBILE USA, INC. 674   2022-10-16   
360-422 1   6529 T-MOBILE USA, INC. 674   2021-03-22   
360-422 2   6529 T-MOBILE USA, INC. 674   2021-03-24   
360-422 3   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2005-09-26   
360-422 4   318J COMCAST IP PHONE, LLC 674   2019-11-02   
360-422 5   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-422 6   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-422 7   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-422 8   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-422 9   6529 T-MOBILE USA, INC. 674   2022-10-16   
360-424 A MTVRWAXXDS1  4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-428 A MTVRWAXXDS1  4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-428 0   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-428 1   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-428 2   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-428 3   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-428 4   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-428 5   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-428 6   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-428 7   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-428 8   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-428 9   624H ONVOY SPECTRUM, LLC 674   2023-06-08   
360-429 A SWLYWAXXRS2  4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-429 0   159F PEERLESS NETWORK OF WASHINGTON, LLC - WA 674   2017-04-15   
360-429 1   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-429 2   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-429 3   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-429 4   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-429 5   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-429 6   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-429 7   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-429 8   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-429 9   5562 METROPCS, INC. 674   2017-04-16   
360-445 A CNWYWAXXRS1  4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-445 0   6529 T-MOBILE USA, INC. 674   2021-07-17   
360-445 1   6529 T-MOBILE USA, INC. 674   2021-07-17   
360-445 2   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-445 3   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-445 4   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-445 5   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-445 6   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-445 7   508J CENTURYLINK COMMUNICATIONS, LLC 674   2013-12-05   
360-445 8   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674   2010-05-30   
360-445 9   624H ONVOY SPECTRUM, LLC 674   2023-06-08   
360-466 A LACNWAXXDS0  4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-466 0   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-466 1   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-466 2   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-466 3   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-466 4   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-466 5   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-466 6   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-466 7   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-466 8   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2005-11-09   
360-466 9   4423 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-488 A STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
360-488 0   483E ONVOY, LLC - WA 674   2019-06-27   
360-488 1   6529 T-MOBILE USA, INC. 674   2020-11-12   
360-488 2   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2013-05-04   
360-488 3   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2014-02-10   
360-488 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 674   2012-10-02   
360-488 5   6529 T-MOBILE USA, INC. 674   2021-06-03   
360-488 6   6529 T-MOBILE USA, INC. 674   2014-04-13   
360-488 7   6529 T-MOBILE USA, INC. 674   2013-12-15   
360-488 8   6529 T-MOBILE USA, INC. 674   2021-06-03   
360-488 9   624H ONVOY SPECTRUM, LLC 674   2023-06-08   
360-503 A STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674      
360-503 0   483E ONVOY, LLC - WA 674   2017-01-27   
360-503 1   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2009-10-16   
360-503 2   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2016-01-26   
360-503 3   6529 T-MOBILE USA, INC. 674   2015-05-15   
360-503 4   6529 T-MOBILE USA, INC. 674   2016-12-23   
360-503 5   6529 T-MOBILE USA, INC. 674   2018-01-07   
360-503 6   6529 T-MOBILE USA, INC. 674   2016-07-21   
360-503 7   6529 T-MOBILE USA, INC. 674   2016-04-10   
360-503 8   6529 T-MOBILE USA, INC. 674   2016-02-07   
360-503 9   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2017-02-13   
360-540 A BOTHWAAK2MD  6529 T-MOBILE USA, INC. 674      
360-542 A MTVRWAXXPMD  622J SKYE TELECOM LLC DBA SKYETEL 674      
360-542 0   622J SKYE TELECOM LLC DBA SKYETEL 674   2022-02-08   
360-542 1   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
360-542 2   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
360-542 3   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
360-542 4   483E ONVOY, LLC - WA 674   2022-12-12   
360-542 5   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
360-542 6   6529 T-MOBILE USA, INC. 674   2024-07-25   
360-542 7   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
360-542 8   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
360-542 9   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
360-588 A ANCRWAXXDS1  4324 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-588 0   4324 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-588 1   4324 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674      
360-588 2   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2005-12-15   
360-588 3   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2005-12-15   
360-588 4   318J COMCAST IP PHONE, LLC 674   2005-03-26   
360-588 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 674   2004-03-16   

<< 1 2 3 4 5 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.