CORE System Availability

The CORE system is available on Monday - Friday from 6:30 a.m. - 8:00 p.m., with user support available from 8:00 a.m. - 5:00 p.m.

The CORE system is also available on weekends from 6:30 a.m. - 8:00 p.m., but, user support is not available during those times.

  • To view system outages due to routine or ad-hoc maintenance, refer to the CORE System Calendar.

CORE Maintenance Schedule and Period Close Dates

On monthly maintenance weekends, the system is down from Friday night to Monday morning.

Are you a Google Calendar user? Click here for instructions on how to add the CORE Calendar to your personal calendar.

CORE Support Center

Need assistance? Contact the CORE Support Center:

  • M-F 8:00 a.m. - 5:00 p.m.
  • 1-844-235-CORE (2673)

Other Contacts

General Questions/Comments
Media Inquiries/Record Requests
  • Adrian Schulte
  • 303-866-6555
Colorado Vendor Self Service (VSS)
  • 303-866-6464