Support Services - Contact Us
By Email
- Sales (sales@qis.net)
- Billing (office@qis.net)
- Support (help@qis.net)
By Phone
- In Maryland: 410-239-6920
- Toll-free: 1-888-889-4NET
- Fax: 410-239-0820
By Mail
Quantum Internet & Telephone
2975B Manchester Road
Manchester, MD 21102
Tech Support Hours
- 9:00am - 9:00pm Monday - Friday
- 10:00am - 5:00pm Saturday
- 12:00pm - 5:00pm Sunday
Sales Centers
DMH Computers
- Open Monday through Friday 8:30-5:00
- Phone: (443) 507-0709
Quantum provides service in Carroll County and the Baltimore metro area!