COS takes pride in customer service, support and satisfaction.

If you need to contact us for any reason, feel free to do so. You can call us, write us, or email us - we look forward to hearing from you! We want to be your valued business partner. For help on topics including sales, support, and supplies, please check out the links under our Support section

Columbia, MD (HQ)
9065 Guilford Rd
Columbia, MD 21046
Toll Free: 888-937-2345
Ph: 301-210-4360

Washington, DC
1800 M St. NW, 5th Floor
Washington, DC 20036
Toll Free: 888-937-2345

Chantilly, VA
4151 Lafayette Center Drive, Suite 100
Chantilly, VA 20151
Toll Free: 888-937-2345


Local Number:  301-210-4360
Service & Supplies: 1-888-937-4283
Sales & Managed Print Services: 888-937-2345