Contact Us

Commonwealth Automobile Reinsurers is conveniently located in Boston's Downtown/Financial District. We are easily accessible from Route 93, the Southeast Expressway, and the Mass. Pike. Within walking distance from the MBTA's Downtown Crossing stop on the Orange Line and South Station stop on the Red Line, as well as the Commuter Rail.

For contacting us with questions or suggestions about our website, email Data Operations or telephone 617-850-4420.

101 Arch Street
Suite 400
Boston, MA 02110
Phone and Fax Numbers
Phone:  617-338-4000
Fax:  617-338-5422
Office Hours
Commonwealth Automobile Reinsurers is open Monday through Friday, 8:30 a.m. to 4:30 p.m. 
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