We would like to inform CS OTE users that CS OTE (including automatic communication and test environment - sandbox) will be unavailable on 20th October 2026 from 17:00 to 23:00 due to regular maintenance. During this maintenance we will apply changes on the basis of operation´s experience. Gas nominations entered into NET4GAS during an OTE maintenance have to be re/nominated. OTE website will be also affected by the outage.

Thank you for Your understanding and we apologize for any inconvenience.