For information about HEPOS, you can contact the system’s user support:

On working days, Monday through Friday from 7:00 a.m. to 7:00 p.m. and οn Saturdays from 7:00 a.m. to 3:00 p.m., on the phones 210-6505834 and 210-6505855 and via email mail to hepos_support@ktimatologio.gr.