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.

Douglas, WY

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
307-298 A CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-298 0   081F BANDWIDTH.COM CLEC, LLC - WY 654   2008-11-29   
307-298 1   450F ONVOY, LLC - WY 654   2012-12-17   
307-298 2   581H AIRUS, INC. - WY 654   2017-08-31   
307-298 3   450F ONVOY, LLC - WY 654   2012-12-17   
307-298 4   9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654   2011-12-30   
307-298 5   9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654   2005-02-26   
307-298 6   450F ONVOY, LLC - WY 654   2006-10-06   
307-298 7   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2012-09-07   
307-298 8   145J TERRA NOVA TELECOM INC. 654   2021-12-02   
307-298 9   081F BANDWIDTH.COM CLEC, LLC - WY 654   2014-06-20   
307-306 A CSPRWYDNIMD  495J STRATUS NETWORKS 654      
307-306 0   450F ONVOY, LLC - WY 654   2021-07-11   
307-306 1   495J STRATUS NETWORKS 654   2021-02-19   
307-306 2   450F ONVOY, LLC - WY 654   2021-07-11   
307-306 3   624H ONVOY SPECTRUM, LLC 654   2021-07-19   
307-306 4   081F BANDWIDTH.COM CLEC, LLC - WY 654   2021-12-03   
307-306 5   081F BANDWIDTH.COM CLEC, LLC - WY 654   2022-03-20   
307-306 6   450F ONVOY, LLC - WY 654   2023-07-23   
307-306 7   6529 T-MOBILE USA, INC. 654   2022-03-31   
307-306 8   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2022-11-04   
307-306 9   081F BANDWIDTH.COM CLEC, LLC - WY 654   2022-02-26   
307-351 A CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-351 0   6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-351 1   6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-351 2   6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-351 3   6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-351 4   6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-351 5   6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-351 6   6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-351 7   145J TERRA NOVA TELECOM INC. 654   2021-05-15   
307-351 8   6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-351 9   6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-358 A DGLSWYMADS0  9636 QWEST CORPORATION 654      
307-359 A CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-359 0   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-359 1   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-359 2   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-359 3   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-359 4   7466 TRI TEL, INC. 654   2010-02-19   
307-359 5   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2011-09-08   
307-359 6   6010 NEW CINGULAR WIRELESS PCS, LLC 654   2010-11-13   
307-359 7   450F ONVOY, LLC - WY 654   2012-01-30   
307-359 8   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-359 9   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2010-02-22   
307-372 A CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-372 0   624H ONVOY SPECTRUM, LLC 654   2021-11-26   
307-372 1   624H ONVOY SPECTRUM, LLC 654   2021-11-26   
307-372 2   450F ONVOY, LLC - WY 654   2020-10-10   
307-372 3   450F ONVOY, LLC - WY 654   2020-10-10   
307-372 4   450F ONVOY, LLC - WY 654   2020-12-19   
307-372 5   450F ONVOY, LLC - WY 654   2020-12-19   
307-372 6   450F ONVOY, LLC - WY 654   2021-03-02   
307-372 7   450F ONVOY, LLC - WY 654   2021-03-02   
307-372 8   450F ONVOY, LLC - WY 654   2021-03-02   
307-372 9   081F BANDWIDTH.COM CLEC, LLC - WY 654   2020-10-11   
307-428 A CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654   2024-02-03   
307-428 0   450F ONVOY, LLC - WY 654   2024-03-07   
307-428 1   450F ONVOY, LLC - WY 654   2024-07-06   
307-428 2   450F ONVOY, LLC - WY 654   2025-03-01   
307-428 3   6529 T-MOBILE USA, INC. 654   2025-12-02   
307-428 4   6529 T-MOBILE USA, INC. 654   2025-05-04   
307-428 5   6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2025-10-15   
307-428 7   6529 T-MOBILE USA, INC. 654   2025-06-11   
307-428 8   450F ONVOY, LLC - WY 654   2025-05-21   
307-428 9   6529 T-MOBILE USA, INC. 654   2024-02-03   
307-624 A CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-624 0   6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-624 1   268A ADVANCED COMMUNICATIONS TECHNOLOGY, INC. - WY 654   2015-01-11   
307-624 2   081F BANDWIDTH.COM CLEC, LLC - WY 654   2016-07-21   
307-624 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 654   2012-06-01   
307-624 4   581H AIRUS, INC. - WY 654   2020-06-19   
307-624 5   450F ONVOY, LLC - WY 654   2023-10-28   
307-624 6   450F ONVOY, LLC - WY 654   2019-09-07   
307-624 7   508J CENTURYLINK COMMUNICATIONS, LLC 654   2015-03-18   
307-624 8   879G TELEPORT COMMUNICATIONS AMERICA WY-LLC 654   2020-09-02   
307-624 9   073H TELNYX LLC 654   2019-03-01   
307-717 A CHYNWYVACM1  013B UNION TELEPHONE COMPANY 654      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.