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.

Mason, MI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
517-244 A MASNMIMSRSA  9323 MICHIGAN BELL TEL CO 346      
517-244 0 MASNMIMSRSA  9323 MICHIGAN BELL TEL CO 346      
517-244 1 MASNMIMSRSA  9323 MICHIGAN BELL TEL CO 346      
517-244 2 MASNMIMSRSA  9323 MICHIGAN BELL TEL CO 346      
517-244 3 MASNMIMSRSA  9323 MICHIGAN BELL TEL CO 346      
517-244 4 MASNMIMSRSA  9323 MICHIGAN BELL TEL CO 346      
517-244 5 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-244 6 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-244 7 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-244 8 MASNMIMSRSA  9323 MICHIGAN BELL TEL CO 346      
517-244 9 MASNMIMSRSA  9323 MICHIGAN BELL TEL CO 346      
517-362 A   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 346   2024-04-06   
517-362 0   991E BANDWIDTH.COM CLEC, LLC - MI 346      
517-362 7   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 346      
517-362 8   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 346      
517-362 9   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 346      
517-525 A LNNGMIXIAMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 346      
517-604 A LNNGMIXIAMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 346      
517-604 0 LNNGMIXIAMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 346      
517-604 1 LNNGMIXIAMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 346      
517-604 2 LNNGMIMNX8Z  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 346      
517-604 3 LNNGMIXIAMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 346      
517-604 4 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-604 5 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-604 6   961J WOW! INTERNET, CABLE AND PHONE 346      
517-604 7 LNNGMIMNXQZ  508J CENTURYLINK COMMUNICATIONS, LLC 346      
517-604 8 LNNGMIXIAMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 346      
517-604 9 LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346      
517-676 A MASNMIMSRSA  9323 MICHIGAN BELL TEL CO 346      
517-722 A LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-722 0 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-722 1 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-722 2 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-722 3 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-722 4 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-722 5 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-722 6 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-722 7 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-722 8 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-722 9 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-833 A LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346      
517-833 0 LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346      
517-833 1 LNNGMIDCHMD  4632 TELNET WORLDWIDE, INC. 346      
517-833 2 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-833 3 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-833 4 LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346      
517-833 5 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-833 6 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-833 7 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-833 8   829J PAETEC ITEL, LLC 346      
517-833 9 LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346      
517-883 A   460K FIRST COMMUNICATIONS, LLC 346      
517-883 0   460K FIRST COMMUNICATIONS, LLC 346      
517-883 1 LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346      
517-883 2 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-883 3 LNNGMIMNXHY  5562 METROPCS, INC. 346      
517-883 4 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-883 5 LNNGMIMNXMZ  516C AT&T CORP. 346      
517-883 6 LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346      
517-883 7   279B CLEAR RATE COMMUNICATIONS, INC. - MI 346      
517-883 8 LNNGMIMNX8Z  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 346      
517-883 9 LNNGMIMNX3Y  2550 123.NET, LLC 346      
517-928 A LNNGMIXIAMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 346      
517-928 0 LNNGMIXIAMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 346      
517-928 1 LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346      
517-928 2 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-928 3 LNNGMIXIAMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 346      
517-928 4 LNNGMIXIAMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 346      
517-928 5 LNNGMIMN00Z  624H ONVOY SPECTRUM, LLC 346      
517-928 6 LNNGMIXIAMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 346      
517-928 8 LNNGMIMNXHY  5562 METROPCS, INC. 346      
517-928 9 LNNGMIDC0MD  939H COMMIO, LLC 346      
517-969 A   829J PAETEC ITEL, LLC 346      
517-969 0   829J PAETEC ITEL, LLC 346      
517-969 2 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-969 3 LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346      
517-969 4 LNNGMIMN02Z  318J COMCAST IP PHONE, LLC 346      
517-969 5 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-969 6 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-969 7 LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346      
517-969 8 LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346      
517-969 9 LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346      
517-978 A MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.