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.
- For billing inquiries or customer service, please e-mail firstname.lastname@example.org.
- For corporate or volume accounts, please e-mail email@example.com or call (877) 736-8791.
We respond promptly to all requests. If you are writing outside of normal business hours, please allow us extra time.
SentryLink 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.