Information on ancillary service providers specified in the Registry maintained by the Transmission System Operator "Ukrenergo". The register contains information about the market participant: EIC code, USREOU code, name of organization, location, role of the participant, registration status and contact details, as well as information on contracts concluded for the provision of frequency and active power control service.

Information on the amount of accepted upward and downward balancing electricity and additional services provided such as: Frequency Containment Reserve, Frequency Restoration Reserve and Restoration Reserve by trade zone.

By February 24, 2022, two separate trade zones "Burshtyn TPP Island" and "Integrated Power System of Ukraine" existed because of the technical features of the Ukrainian energy system. In order to test the stability of the energy system in preparation for integration with ENTSO-E, the 24.02.2022 Ukrainian energy network was disconnected from the networks of all neighbouring countries (except Moldova), and the internal systems were synchronized. Since that moment, there is a single trading zone for the entire energy system of Ukraine.