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.

Romulus, MI

1 2 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
734-229 A RMLSMIMNDS0  9323 MICHIGAN BELL TEL CO 340      
734-229 0   9323 MICHIGAN BELL TEL CO 340      
734-229 1   9323 MICHIGAN BELL TEL CO 340      
734-229 2   9323 MICHIGAN BELL TEL CO 340      
734-229 3   9323 MICHIGAN BELL TEL CO 340      
734-229 4   9323 MICHIGAN BELL TEL CO 340      
734-229 5   9323 MICHIGAN BELL TEL CO 340      
734-229 6   9323 MICHIGAN BELL TEL CO 340      
734-229 7   9323 MICHIGAN BELL TEL CO 340      
734-229 8   460K FIRST COMMUNICATIONS, LLC 340   2010-08-06   
734-229 9   9323 MICHIGAN BELL TEL CO 340      
734-247 A RMLSMIMNDS0  9323 MICHIGAN BELL TEL CO 340      
734-247 0   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2016-04-11   
734-247 1   9323 MICHIGAN BELL TEL CO 340      
734-247 2   9323 MICHIGAN BELL TEL CO 340      
734-247 3   9323 MICHIGAN BELL TEL CO 340      
734-247 4   9323 MICHIGAN BELL TEL CO 340      
734-247 5   9323 MICHIGAN BELL TEL CO 340      
734-247 6   9323 MICHIGAN BELL TEL CO 340      
734-247 7   9323 MICHIGAN BELL TEL CO 340      
734-247 8   2550 123.NET, LLC 340   2011-09-26   
734-247 9   046L CLEAR RATE COMMUNICATIONS, LLC 340   2009-11-14   
734-267 A CMPTMIIFCM0  9748 AMERICAN MESSAGING SERVICES, LLC 340      
734-380 A SFLDMIMKDS2  6630 USA MOBILITY WIRELESS, INC. 340      
734-403 A FLNTMICD0MD  829J PAETEC ITEL, LLC 340      
734-403 0   829J PAETEC ITEL, LLC 340      
734-403 1   829J PAETEC ITEL, LLC 340   2005-04-10   
734-403 2   829J PAETEC ITEL, LLC 340      
734-403 3   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2005-02-10   
734-403 4   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2003-03-22   
734-403 5   3535 ACD TELECOM, INC. - MI 340   2005-05-02   
734-403 6   817J INTERACTIVE SERVICES NETWORK, INC. 340   2005-09-04   
734-403 7   145J TERRA NOVA TELECOM INC. 340   2024-08-12   
734-403 8   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2014-07-13   
734-403 9   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2014-07-13   
734-406 A DTRTMIAPG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340      
734-406 0   624H ONVOY SPECTRUM, LLC 340   2021-12-02   
734-406 1   624H ONVOY SPECTRUM, LLC 340   2021-12-02   
734-406 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2024-12-20   
734-406 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2021-08-07   
734-406 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2018-05-19   
734-406 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2018-05-19   
734-406 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2017-09-18   
734-406 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2017-09-18   
734-406 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2017-04-27   
734-406 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2017-04-27   
734-413 A SFLDMIQJDS1  7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
734-413 0   145J TERRA NOVA TELECOM INC. 340   2025-11-24   
734-413 1   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2014-07-13   
734-413 2   9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
734-413 3   792K CHARTER IP ENABLED SERVICES, LLC 340   2007-02-25   
734-413 4   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
734-413 5   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
734-413 6   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2014-07-13   
734-413 7   991E BANDWIDTH.COM CLEC, LLC - MI 340   2010-08-15   
734-413 8   991E BANDWIDTH.COM CLEC, LLC - MI 340   2011-07-09   
734-413 9   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2014-07-13   
734-442 A FLNTMICD0MD  829J PAETEC ITEL, LLC 340      
734-442 0   829J PAETEC ITEL, LLC 340      
734-442 1   829J PAETEC ITEL, LLC 340      
734-442 2   543C ONVOY, LLCV - MI 340   2012-07-19   
734-442 3   3535 ACD TELECOM, INC. - MI 340   2006-01-13   
734-442 4   961J WOW! INTERNET, CABLE AND PHONE 340   2004-08-15   
734-442 5   829J PAETEC ITEL, LLC 340      
734-442 6   961J WOW! INTERNET, CABLE AND PHONE 340   2007-08-02   
734-442 7   516C AT&T CORP. 340   2006-06-30   
734-442 8   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2016-04-11   
734-442 9   829J PAETEC ITEL, LLC 340      
734-494 A   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-494 0   991E BANDWIDTH.COM CLEC, LLC - MI 340   2009-03-07   
734-494 1   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-494 2   991E BANDWIDTH.COM CLEC, LLC - MI 340   2010-02-22   
734-494 3   829J PAETEC ITEL, LLC 340   2007-12-11   
734-494 4   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-494 5   543C ONVOY, LLCV - MI 340   2007-05-18   
734-494 8   145J TERRA NOVA TELECOM INC. 340   2021-09-24   
734-499 A SFLDMIMK8MD  965H FRACTEL, LLC 340      
734-499 0   543C ONVOY, LLCV - MI 340   2023-07-23   
734-499 1   543C ONVOY, LLCV - MI 340   2021-03-27   
734-499 2   543C ONVOY, LLCV - MI 340   2021-03-27   
734-499 3   543C ONVOY, LLCV - MI 340   2021-03-27   
734-499 4   543C ONVOY, LLCV - MI 340   2021-03-27   
734-499 5   624H ONVOY SPECTRUM, LLC 340   2021-06-15   
734-499 9   965H FRACTEL, LLC 340   2020-10-19   
734-532 A SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-532 0   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2012-01-02   
734-532 1   770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
734-532 2   543C ONVOY, LLCV - MI 340   2023-03-12   
734-532 3   543C ONVOY, LLCV - MI 340   2023-07-03   
734-532 4   318J COMCAST IP PHONE, LLC 340   2012-03-09   
734-532 5   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2013-04-08   
734-532 6   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2013-04-08   
734-532 8   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-685 A SFLDMIQJDS1  7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
734-685 0   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2015-04-19   
734-685 1   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340   2015-02-16   
734-685 2   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2016-04-11   
734-685 3   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2016-04-11   
734-685 4   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2015-04-19   
734-685 5   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2015-04-19   

1 2 >>

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.