SentryLink is proud to serve hundreds of businesses and consumers each day. We have additional corporate services available, including batch processing, alternate billing arrangements, and toll-free customer support. We welcome your interest and look forward to hearing from you.
We respond promptly to all requests. If you are writing outside of normal business hours, please allow us extra time.
is located in the NASA high-tech corridor, at the conjunction of 495 and
the Baltimore-Washington Expressway.
Maryland Trade Center I
7500 Greenway Center Drive
Greenbelt, MD 20770
Sales: (301) 486-0862 or (877) SENTRY1 (877-736-8791).
Customer Service: (301) 486-0862
Monday-Friday 9AM to 6PM Eastern
For customer service issues, e-mail is fastest. Please reply to your order receipt if possible, as that will include all the necessary information to look up your order.