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.

Bay City, MI

<< 1 2

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
989-531 0 SGNWMIACPMD  616J LEAP TELECOM, LLC 344   2024-12-15   
989-545 A SGNWMIFAXOY  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 344      
989-545 0 SGNWMIFAXOY  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 344   2009-09-25   
989-545 1 SGNWMIFAXJX  991E BANDWIDTH.COM CLEC, LLC - MI 344   2009-03-06   
989-545 2 SGNWMIFAXOY  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 344   2010-05-27   
989-545 3 SGNWMIFADS1  3535 ACD TELECOM, INC. - MI 344   2009-01-22   
989-545 4 SGNWMIFAXKX  543C ONVOY, LLCV - MI 344   2008-12-10   
989-545 5 SGNWMIACCMD  145J TERRA NOVA TELECOM INC. 344   2024-12-04   
989-545 6   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 344   2025-01-31   
989-545 7   145J TERRA NOVA TELECOM INC. 344   2025-10-04   
989-545 8 SGNWMIFAXOY  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 344   2010-11-12   
989-545 9 SGNWMIFAXOY  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 344   2008-10-27   
989-667 A BYCYMIWSDS0  9323 MICHIGAN BELL TEL CO 344      
989-671 A BYCYMIWSDS0  9323 MICHIGAN BELL TEL CO 344      
989-671 0 BYCYMIWSDS0  9323 MICHIGAN BELL TEL CO 344      
989-671 1 BYCYMIWSDS0  9323 MICHIGAN BELL TEL CO 344      
989-671 2 BYCYMIWSDS0  9323 MICHIGAN BELL TEL CO 344      
989-671 3 BYCYMIWSDS0  9323 MICHIGAN BELL TEL CO 344      
989-671 4 BYCYMIWSDS0  9323 MICHIGAN BELL TEL CO 344      
989-671 5 BYCYMIWSDS0  9323 MICHIGAN BELL TEL CO 344      
989-671 6 BYCYMIWSDS0  9323 MICHIGAN BELL TEL CO 344      
989-671 7 SGNWMIFAXOY  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 344   2006-11-06   
989-671 8 BYCYMIWSDS0  9323 MICHIGAN BELL TEL CO 344      
989-671 9 BYCYMIWSDS0  9323 MICHIGAN BELL TEL CO 344      
989-684 A BYCYMIWSDS0  9323 MICHIGAN BELL TEL CO 344      
989-686 A BYCYMIWSDS0  9323 MICHIGAN BELL TEL CO 344      
989-778 A   792K CHARTER IP ENABLED SERVICES, LLC 344      
989-778 0 SGNWMIFAXOY  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 344   2018-10-08   
989-778 1   792K CHARTER IP ENABLED SERVICES, LLC 344   2013-11-14   
989-778 2   792K CHARTER IP ENABLED SERVICES, LLC 344   2015-11-05   
989-778 3   792K CHARTER IP ENABLED SERVICES, LLC 344   2018-05-22   
989-778 4 SGNWMIFAXJX  991E BANDWIDTH.COM CLEC, LLC - MI 344   2021-10-25   
989-778 5   792K CHARTER IP ENABLED SERVICES, LLC 344   2019-04-21   
989-778 6 SGNWMIFAXJX  991E BANDWIDTH.COM CLEC, LLC - MI 344   2021-10-25   
989-778 7 SGNWMIFAXFY  5562 METROPCS, INC. 344   2018-04-09   
989-778 8 SGNWMIFAXFY  5562 METROPCS, INC. 344   2020-08-16   
989-778 9 SGNWMIFAXJX  991E BANDWIDTH.COM CLEC, LLC - MI 344   2021-10-25   
989-891 A BYCYMIMNDS0  9323 MICHIGAN BELL TEL CO 344      
989-891 0 BYCYMIMNDS0  9323 MICHIGAN BELL TEL CO 344      
989-891 1 BYCYMIMNDS0  9323 MICHIGAN BELL TEL CO 344      
989-891 2 BYCYMIMNDS0  9323 MICHIGAN BELL TEL CO 344      
989-891 3 BYCYMIMNDS0  9323 MICHIGAN BELL TEL CO 344      
989-891 4 BYCYMIMNDS0  9323 MICHIGAN BELL TEL CO 344      
989-891 5 BYCYMIMNDS0  9323 MICHIGAN BELL TEL CO 344      
989-891 6 SGNWMIFAXOY  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 344   2007-01-04   
989-891 7 SGNWMIFAXOY  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 344   2006-09-14   
989-891 8 BYCYMIMNDS0  9323 MICHIGAN BELL TEL CO 344      
989-891 9 BYCYMIMNDS0  9323 MICHIGAN BELL TEL CO 344      
989-892 A BYCYMIMNDS0  9323 MICHIGAN BELL TEL CO 344      
989-893 A BYCYMIMNDS0  9323 MICHIGAN BELL TEL CO 344      
989-894 A BYCYMIMNDS0  9323 MICHIGAN BELL TEL CO 344      
989-895 A BYCYMIMNDS0  9323 MICHIGAN BELL TEL CO 344      
989-897 A SGNWMIFAXTY  506J TWILIO INTERNATIONAL, INC. 344      
989-897 0 SGNWMIFAXJX  991E BANDWIDTH.COM CLEC, LLC - MI 344   2022-10-07   
989-897 1 SGNWMIFAXFY  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 344   2024-03-16   
989-897 2 SGNWMIFAXFY  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 344   2024-03-16   
989-897 6 SGNWMIACDS1  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 344   2024-11-02   
989-897 7 SGNWMIACEMD  516J TON80 COMMUNICATIONS, LLC 344   2022-04-21   
989-897 8 SGNWMIFAXTY  506J TWILIO INTERNATIONAL, INC. 344   2022-03-12   
989-897 9 SGNWMIFAXFY  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 344   2024-03-16   
989-922 A SGNWMIFAXEX  829J PAETEC ITEL, LLC 344      
989-929 A SGNWMIFAXDX  9748 AMERICAN MESSAGING SERVICES, LLC 344      

<< 1 2

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.