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CORE System Availability

  • M-F: 6:30 a.m. - 8:00 p.m.
  • Sa-Su: 6:30 a.m. - 8:00 p.m. (with the exception of maintenance windows).

CORE Maintenance Schedule and Period Close Dates

On monthly maintenance weekends, the system is down from 8:00 p.m. Friday night to 6:30 a.m. 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)
  • core.help@state.co.us
  • Hangout Button



Other Contacts

Training
  • core.training@state.co.us
Colorado Vendor Self Service (VSS)
  • 303-866-6464
  • dpa_vsshelp@state.co.us