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.

Rockwood, MI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
734-236 A FLNTMICD0MD  829J PAETEC ITEL, LLC 340      
734-236 0   624H ONVOY SPECTRUM, LLC 340   2021-12-02   
734-236 1   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2004-03-29   
734-236 4   318J COMCAST IP PHONE, LLC 340   2005-03-23   
734-236 5   3535 ACD TELECOM, INC. - MI 340   2005-05-02   
734-236 6   991E BANDWIDTH.COM CLEC, LLC - MI 340   2010-09-11   
734-236 7   829J PAETEC ITEL, LLC 340   2004-03-08   
734-236 8   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340   2005-02-18   
734-236 9   543C ONVOY, LLCV - MI 340   2021-01-30   
734-379 A RKWDMIRWRS0  9323 MICHIGAN BELL TEL CO 340      
734-441 A FLNTMICD0MD  829J PAETEC ITEL, LLC 340      
734-441 0   991E BANDWIDTH.COM CLEC, LLC - MI 340   2016-05-08   
734-441 1   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340   2005-07-19   
734-441 2   543C ONVOY, LLCV - MI 340   2020-09-07   
734-441 3   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2006-10-01   
734-441 4   792K CHARTER IP ENABLED SERVICES, LLC 340   2007-02-24   
734-441 5   829J PAETEC ITEL, LLC 340   2009-11-16   
734-441 6   991E BANDWIDTH.COM CLEC, LLC - MI 340   2014-02-24   
734-441 7   516C AT&T CORP. 340   2006-06-30   
734-441 8   829J PAETEC ITEL, LLC 340      
734-441 9   543C ONVOY, LLCV - MI 340   2020-09-07   
734-471 A   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-471 0   145J TERRA NOVA TELECOM INC. 340   2025-04-09   
734-471 1   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-471 2   543C ONVOY, LLCV - MI 340   2021-01-30   
734-471 3   543C ONVOY, LLCV - MI 340   2021-01-30   
734-471 5   543C ONVOY, LLCV - MI 340   2012-07-19   
734-471 6   933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 340   2014-05-01   
734-471 7   5562 METROPCS, INC. 340   2022-04-18   
734-471 8   624H ONVOY SPECTRUM, LLC 340   2021-06-15   
734-603 A SFLDMITODS2  543C ONVOY, LLCV - MI 340      
734-603 0   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2024-03-16   
734-603 1   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2024-03-16   
734-603 2   543C ONVOY, LLCV - MI 340   2023-08-27   
734-603 3   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2025-10-24   
734-603 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2024-01-07   
734-749 A SFLDMIQJDS1  7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
734-749 0   145J TERRA NOVA TELECOM INC. 340   2026-01-05   
734-749 1   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
734-749 2   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
734-749 4   5562 METROPCS, INC. 340   2006-02-04   
734-749 5   5562 METROPCS, INC. 340   2017-07-31   
734-749 6   543C ONVOY, LLCV - MI 340   2016-03-28   
734-749 7   318J COMCAST IP PHONE, LLC 340   2008-11-19   
734-749 8   543C ONVOY, LLCV - MI 340   2016-03-28   
734-749 9   543C ONVOY, LLCV - MI 340   2013-01-30   
734-969 A SFLDMIBVDS0  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
734-969 0   543C ONVOY, LLCV - MI 340   2022-12-29   
734-969 1   624H ONVOY SPECTRUM, LLC 340   2021-12-02   
734-969 2   933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 340   2019-12-26   
734-969 3   046L CLEAR RATE COMMUNICATIONS, LLC 340   2010-03-12   
734-969 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2015-10-10   
734-969 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2015-10-10   
734-969 7   508J CENTURYLINK COMMUNICATIONS, LLC 340   2014-04-01   
734-969 8   2550 123.NET, LLC 340   2012-12-01   
734-969 9   770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.