Austria
TIWAG-Netz AG
VERBUND APG
VKW-ÜN
Belgium
Elia
Bosnia-Herzegovina
JPCC
Bulgaria
NEK
Croatia
HEP
Czech Republic
CEPS a.s.
Denmark
Energinet.dk
France
RTE
FYROM
MEPSO
Germany
EnBW Transportnetze
E.ON Netz
RWE Tr. Netz Strom
VE Transmission
Greece
HTSO/DESMIE
Hungary
MAVIR ZRt.
Italy
Terna
Luxembourg
CEGEDEL Net S.A.
Netherlands
TenneT
Poland
PSE-Operator SA
Portugal
REN
Romania
Transelectrica
Slovak Republic
SEPS a.s.
Slovenia
ELES
Spain
REE
Switzerland
ATEL
BKW UTN
EGL Grid AG
EOS
ETRANS
NOK