CeREs, the Compact Radiation belt Explorer, was a 3U CubeSat, whose primary science goal was to study electron microbursts to further our understanding of electron loss from the radiation belts. The spacecraft was launched to a circular 85° high-inclination orbit at an altitude of 500 km on December 16, 2018. Initial contact was made within the first week by the NASA Wallops Flight Facility UHF ground station. The spacecraft telemetry showed that the system functions were nominal. However, after December 21, 2018, no further contact with CeREs has been made. The ground station continued passive listening searches for several months, but these attempts were unsuccessful.