By Email

• Sales (sales@qis.net)
• Billing (office@qis.net)
• Support (help@qis.net)

• In Maryland: 410-239-6920
• Toll-free: 888-889-4-NET
• Fax: 410-239-0820

Quantum Internet Services, Inc.
2975B Manchester Road
Manchester, MD 21102

• 9:00am - 9:00pm Monday - Friday
• 10:00am - 5:00pm Saturday
• 12:00pm - 5:00pm Sunday

Sales Centers

• Advanced Computers
  • Open Monday to Friday 10-6
  • Phone: (410) 876-7576 or (410) 848-8120
  • Located at 85 West Main Street, Westminster
  
  
• CMC Computers
  • Open Monday to Friday 9-7 Saturday 9-12
  • Phone: (410) 840-0100
  • Located at Rt 140, Westminster
  
  
• DMH Computers
  • Open Monday thru Friday 10-5
  • Phone: (443) 507-0709
  • Located at 838 S. Main St. Hampstead, MD
  
  
• docuMacs Technology Consultants (Mac Specialists)
  • Phone: (410) 751-7650
  • Located in Westminster
  
  
• Hartman Computer Services
  • Phone: (717) 624-4100
  • Located at 4480 York Road, New Oxford PA
  
  
• Computer Repair Associates
  • Open M-Th 9-5, F 10-7
  • Phone: (410) 374-0051
  • Located at 1005 S. Main Street, Hampstead, MD
  
  
• Networking Solutions
  • Phone: (717) 637-0667
  • Located at 398 York St., Hanover PA
  • Hours: M-F 8:00-5:00
  
  
• A&E Techs
  • Phone: (410) 259-7209
  • Located in Westminster