Russia

(The real number of concentration and extermination camps established in occupied Soviet Union by the Nazies is unknown. The following list contains the name of the major camps. Some of these camps were under Romanian control; e.g. Akmétchetka or Bogdanovka where 54,000 were executed between December 21th and December 31th, 1941)
Akmétchetka
Balanowka
Bar
Bisjumujsje
Bogdanovka
"Citadelle" (The real name of this camp is unknown. The camp was located near Lvov. Thousands of Russians POW were killed in this camp)
Czwartaki
Daugavpils
Domanievka
Edineti
Kielbasin (or Kelbassino)
Khorol
Lemberg
Mezjapark
Rawa-Russkaja
Strazdumujsje
Yanowski
Vertugen
(for all these camps, no subcamp known).

I have no more information as to camps at this time...