Please be informed that, due to the cancellation of IDA1 for the delivery date 25/08/2026, no IDA1 publication data will be available in the CORE ID CCR Publication Tool
Leading service provider for Transmission System Operators (TSOs) in the European electricity market.
Through our single trading platform we auction cross-border transmission capacity rights. We also provide accounting (clearing and settlement), contracting, reporting, project support and IT services.
Auctions
On behalf of TSOs, we organize long and short-term auctions of transmission capacity rights.
We offer the following products: yearly, seasonal, quarterly, monthly, weekly, daily and intraday.
- 500+Registered market participants
- 26k+Auctions held annually
- 100%Auction tool availability
- 80+Employees
- 50TSOs serviced
Latest market messages
- Publication Tool data for Core ID CCR IDA1 Delivery Day 25/08/2026Published: 24/08/2026 | 22:03 by JAO
- Capacity Curtailment on the ES-FR border for delivery period 26-08-2026Published: 24/08/2026 | 21:34 by JAO
- Capacity Curtailment on the FR-CH border for delivery period 26-08-2026Published: 24/08/2026 | 17:14 by JAO
- Capacity Curtailment on the IF1-GB-FR border for delivery period 07-09-2026Published: 24/08/2026 | 15:51 by JAO
- Capacity Curtailment on the FR-CH border for delivery period 25-08-2026Published: 23/08/2026 | 18:58 by JAO
- Capacity Curtailment on the IF1-GB-FR border for delivery period 06-09-2026Published: 23/08/2026 | 15:16 by JAO
- Capacity Curtailment on the FR-CH border for delivery period 24-08-2026Published: 22/08/2026 | 17:49 by JAO
Publication Tool data for Core ID CCR IDA1 Delivery Day 25/08/2026
by JAO
Capacity Curtailment on the ES-FR border for delivery period 26-08-2026
by JAO
1. TSO(s)*:
RTE-TSO
2. Identification of affected Long Term Transmission Rights:
ES-FR
3. Triggering event:
Curtailment to ensure operation remains within Operational Security Limits
4. Affected volume in MW / hour for each concerned period:
26-08-2026 11:00 - 12:00 674 MW
26-08-2026 12:00 - 13:00 674 MW
26-08-2026 13:00 - 14:00 674 MW
26-08-2026 14:00 - 15:00 674 MW
26-08-2026 15:00 - 16:00 674 MW
26-08-2026 16:00 - 17:00 674 MW
5. Amount of LTTR remaining after curtailment:
26-08-2026 11:00 - 12:00 276 MW
26-08-2026 12:00 - 13:00 276 MW
26-08-2026 13:00 - 14:00 276 MW
26-08-2026 14:00 - 15:00 276 MW
26-08-2026 15:00 - 16:00 276 MW
26-08-2026 16:00 - 17:00 276 MW
6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:
26/08/2026
11:00-12:00 Dambron - Verger
12:00-13:00 Dambron - Verger
13:00-14:00 Dambron - Verger
14:00-15:00 Dambron - Verger
15:00-16:00 Dambron - Verger
16:00-17:00 Dambron - Verger
7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?
The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits
Capacity Curtailment on the FR-CH border for delivery period 26-08-2026
by JAO
1. TSO(s)*:
RTE-TSO
2. Identification of affected Long Term Transmission Rights:
FR-CH
3. Triggering event:
Curtailment to ensure operation remains within Operational Security Limits
4. Affected volume in MW / hour for each concerned period:
26-08-2026 00:00 - 01:00 370 MW
26-08-2026 01:00 - 02:00 370 MW
26-08-2026 02:00 - 03:00 370 MW
26-08-2026 03:00 - 04:00 370 MW
26-08-2026 04:00 - 05:00 370 MW
26-08-2026 05:00 - 06:00 370 MW
26-08-2026 06:00 - 07:00 370 MW
26-08-2026 07:00 - 08:00 370 MW
26-08-2026 08:00 - 09:00 370 MW
26-08-2026 09:00 - 10:00 370 MW
26-08-2026 10:00 - 11:00 370 MW
26-08-2026 11:00 - 12:00 370 MW
26-08-2026 12:00 - 13:00 370 MW
26-08-2026 13:00 - 14:00 370 MW
26-08-2026 14:00 - 15:00 370 MW
26-08-2026 15:00 - 16:00 370 MW
26-08-2026 16:00 - 17:00 370 MW
26-08-2026 17:00 - 18:00 370 MW
26-08-2026 18:00 - 19:00 370 MW
26-08-2026 19:00 - 20:00 370 MW
26-08-2026 20:00 - 21:00 370 MW
26-08-2026 21:00 - 22:00 370 MW
26-08-2026 22:00 - 23:00 370 MW
26-08-2026 23:00 - 24:00 370 MW
5. Amount of LTTR remaining after curtailment:
26-08-2026 00:00 - 01:00 0 MW
26-08-2026 01:00 - 02:00 0 MW
26-08-2026 02:00 - 03:00 0 MW
26-08-2026 03:00 - 04:00 0 MW
26-08-2026 04:00 - 05:00 0 MW
26-08-2026 05:00 - 06:00 0 MW
26-08-2026 06:00 - 07:00 0 MW
26-08-2026 07:00 - 08:00 0 MW
26-08-2026 08:00 - 09:00 0 MW
26-08-2026 09:00 - 10:00 0 MW
26-08-2026 10:00 - 11:00 0 MW
26-08-2026 11:00 - 12:00 0 MW
26-08-2026 12:00 - 13:00 0 MW
26-08-2026 13:00 - 14:00 0 MW
26-08-2026 14:00 - 15:00 0 MW
26-08-2026 15:00 - 16:00 0 MW
26-08-2026 16:00 - 17:00 0 MW
26-08-2026 17:00 - 18:00 0 MW
26-08-2026 18:00 - 19:00 0 MW
26-08-2026 19:00 - 20:00 0 MW
26-08-2026 20:00 - 21:00 0 MW
26-08-2026 21:00 - 22:00 0 MW
26-08-2026 22:00 - 23:00 0 MW
26-08-2026 23:00 - 24:00 0 MW
6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:
00:00-01:00 Network Security
01:00-02:00 Network Security
02:00-03:00 Network Security
03:00-04:00 Network Security
04:00-05:00 Network Security
05:00-06:00 Network Security
06:00-07:00 Network Security
07:00-08:00 Network Security
08:00-09:00 Network Security
09:00-10:00 Network Security
10:00-11:00 Network Security
11:00-12:00 Network Security
12:00-13:00 Network Security
13:00-14:00 Network Security
14:00-15:00 Network Security
15:00-16:00 Network Security
16:00-17:00 Network Security
17:00-18:00 Network Security
18:00-19:00 Network Security
19:00-20:00 Network Security
20:00-21:00 Network Security
21:00-22:00 Network Security
22:00-23:00 Network Security
23:00-24:00 Network Security
7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?
The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits
*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication
Capacity Curtailment on the IF1-GB-FR border for delivery period 07-09-2026
by JAO
1. TSO(s)*:
RNP
2. Identification of affected Long Term Transmission Rights:
IF1-GB-FR
3. Triggering event:
Curtailment to ensure operation remains within Operational Security Limits
4. Affected volume in MW / hour for each concerned period:
07-09-2026 00:00 - 01:00 1697 MW
07-09-2026 01:00 - 02:00 1697 MW
07-09-2026 02:00 - 03:00 1697 MW
07-09-2026 03:00 - 04:00 1697 MW
07-09-2026 04:00 - 05:00 1697 MW
07-09-2026 05:00 - 06:00 1697 MW
07-09-2026 06:00 - 07:00 1697 MW
07-09-2026 07:00 - 08:00 1697 MW
07-09-2026 08:00 - 09:00 1697 MW
07-09-2026 09:00 - 10:00 1697 MW
07-09-2026 10:00 - 11:00 1697 MW
07-09-2026 11:00 - 12:00 1697 MW
07-09-2026 12:00 - 13:00 1697 MW
07-09-2026 13:00 - 14:00 1697 MW
07-09-2026 14:00 - 15:00 1697 MW
07-09-2026 15:00 - 16:00 1697 MW
07-09-2026 16:00 - 17:00 1697 MW
07-09-2026 17:00 - 18:00 1697 MW
07-09-2026 18:00 - 19:00 1697 MW
07-09-2026 19:00 - 20:00 1697 MW
07-09-2026 20:00 - 21:00 1697 MW
07-09-2026 21:00 - 22:00 1697 MW
07-09-2026 22:00 - 23:00 1697 MW
07-09-2026 23:00 - 24:00 1697 MW
5. Amount of LTTR remaining after curtailment:
07-09-2026 00:00 - 01:00 899 MW
07-09-2026 01:00 - 02:00 899 MW
07-09-2026 02:00 - 03:00 899 MW
07-09-2026 03:00 - 04:00 899 MW
07-09-2026 04:00 - 05:00 899 MW
07-09-2026 05:00 - 06:00 899 MW
07-09-2026 06:00 - 07:00 899 MW
07-09-2026 07:00 - 08:00 899 MW
07-09-2026 08:00 - 09:00 899 MW
07-09-2026 09:00 - 10:00 899 MW
07-09-2026 10:00 - 11:00 899 MW
07-09-2026 11:00 - 12:00 899 MW
07-09-2026 12:00 - 13:00 899 MW
07-09-2026 13:00 - 14:00 899 MW
07-09-2026 14:00 - 15:00 899 MW
07-09-2026 15:00 - 16:00 899 MW
07-09-2026 16:00 - 17:00 899 MW
07-09-2026 17:00 - 18:00 899 MW
07-09-2026 18:00 - 19:00 899 MW
07-09-2026 19:00 - 20:00 899 MW
07-09-2026 20:00 - 21:00 899 MW
07-09-2026 21:00 - 22:00 899 MW
07-09-2026 22:00 - 23:00 899 MW
07-09-2026 23:00 - 24:00 899 MW
6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:
Thermal Limits
7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?
Capacity limitation due to unplanned maintenance
Capacity Curtailment on the FR-CH border for delivery period 25-08-2026
by JAO
1. TSO(s)*:
RTE-TSO
2. Identification of affected Long Term Transmission Rights:
FR-CH
3. Triggering event:
Curtailment to ensure operation remains within Operational Security Limits
4. Affected volume in MW / hour for each concerned period:
25-08-2026 00:00 - 01:00 370 MW
25-08-2026 01:00 - 02:00 370 MW
25-08-2026 02:00 - 03:00 370 MW
25-08-2026 03:00 - 04:00 370 MW
25-08-2026 04:00 - 05:00 370 MW
25-08-2026 05:00 - 06:00 370 MW
25-08-2026 06:00 - 07:00 370 MW
25-08-2026 07:00 - 08:00 370 MW
25-08-2026 08:00 - 09:00 370 MW
25-08-2026 09:00 - 10:00 370 MW
25-08-2026 10:00 - 11:00 370 MW
25-08-2026 11:00 - 12:00 370 MW
25-08-2026 12:00 - 13:00 370 MW
25-08-2026 13:00 - 14:00 370 MW
25-08-2026 14:00 - 15:00 370 MW
25-08-2026 15:00 - 16:00 370 MW
25-08-2026 16:00 - 17:00 370 MW
25-08-2026 17:00 - 18:00 370 MW
25-08-2026 18:00 - 19:00 370 MW
25-08-2026 19:00 - 20:00 370 MW
25-08-2026 20:00 - 21:00 370 MW
25-08-2026 21:00 - 22:00 370 MW
25-08-2026 22:00 - 23:00 370 MW
25-08-2026 23:00 - 24:00 370 MW
5. Amount of LTTR remaining after curtailment:
25-08-2026 00:00 - 01:00 0 MW
25-08-2026 01:00 - 02:00 0 MW
25-08-2026 02:00 - 03:00 0 MW
25-08-2026 03:00 - 04:00 0 MW
25-08-2026 04:00 - 05:00 0 MW
25-08-2026 05:00 - 06:00 0 MW
25-08-2026 06:00 - 07:00 0 MW
25-08-2026 07:00 - 08:00 0 MW
25-08-2026 08:00 - 09:00 0 MW
25-08-2026 09:00 - 10:00 0 MW
25-08-2026 10:00 - 11:00 0 MW
25-08-2026 11:00 - 12:00 0 MW
25-08-2026 12:00 - 13:00 0 MW
25-08-2026 13:00 - 14:00 0 MW
25-08-2026 14:00 - 15:00 0 MW
25-08-2026 15:00 - 16:00 0 MW
25-08-2026 16:00 - 17:00 0 MW
25-08-2026 17:00 - 18:00 0 MW
25-08-2026 18:00 - 19:00 0 MW
25-08-2026 19:00 - 20:00 0 MW
25-08-2026 20:00 - 21:00 0 MW
25-08-2026 21:00 - 22:00 0 MW
25-08-2026 22:00 - 23:00 0 MW
25-08-2026 23:00 - 24:00 0 MW
6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:
25/08/2026
00:00-01:00 Network Security
01:00-02:00 Network Security
02:00-03:00 Network Security
03:00-04:00 Network Security
04:00-05:00 Network Security
05:00-06:00 Network Security
06:00-07:00 Network Security
07:00-08:00 Network Security
08:00-09:00 Network Security
09:00-10:00 Network Security
10:00-11:00 Network Security
11:00-12:00 Network Security
12:00-13:00 Network Security
13:00-14:00 Network Security
14:00-15:00 Network Security
15:00-16:00 Network Security
16:00-17:00 Network Security
17:00-18:00 Network Security
18:00-19:00 Network Security
19:00-20:00 Network Security
20:00-21:00 Network Security
21:00-22:00 Network Security
22:00-23:00 Network Security
23:00-24:00 Network Security
7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?
The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits
*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication
Capacity Curtailment on the IF1-GB-FR border for delivery period 06-09-2026
by JAO
1. TSO(s)*:
RNP
2. Identification of affected Long Term Transmission Rights:
IF1-GB-FR
3. Triggering event:
Curtailment to ensure operation remains within Operational Security Limits
4. Affected volume in MW / hour for each concerned period:
06-09-2026 00:00 - 01:00 1697 MW
06-09-2026 01:00 - 02:00 1697 MW
06-09-2026 02:00 - 03:00 1697 MW
06-09-2026 03:00 - 04:00 1697 MW
06-09-2026 04:00 - 05:00 1697 MW
06-09-2026 05:00 - 06:00 1697 MW
06-09-2026 06:00 - 07:00 1697 MW
06-09-2026 07:00 - 08:00 1697 MW
06-09-2026 08:00 - 09:00 1697 MW
06-09-2026 09:00 - 10:00 1697 MW
06-09-2026 10:00 - 11:00 1697 MW
06-09-2026 11:00 - 12:00 1697 MW
06-09-2026 12:00 - 13:00 1697 MW
06-09-2026 13:00 - 14:00 1697 MW
06-09-2026 14:00 - 15:00 1697 MW
06-09-2026 15:00 - 16:00 1697 MW
06-09-2026 16:00 - 17:00 1697 MW
06-09-2026 17:00 - 18:00 1697 MW
06-09-2026 18:00 - 19:00 1697 MW
06-09-2026 19:00 - 20:00 1697 MW
06-09-2026 20:00 - 21:00 1697 MW
06-09-2026 21:00 - 22:00 1697 MW
06-09-2026 22:00 - 23:00 1697 MW
06-09-2026 23:00 - 24:00 1697 MW
5. Amount of LTTR remaining after curtailment:
06-09-2026 00:00 - 01:00 899 MW
06-09-2026 01:00 - 02:00 899 MW
06-09-2026 02:00 - 03:00 899 MW
06-09-2026 03:00 - 04:00 899 MW
06-09-2026 04:00 - 05:00 899 MW
06-09-2026 05:00 - 06:00 899 MW
06-09-2026 06:00 - 07:00 899 MW
06-09-2026 07:00 - 08:00 899 MW
06-09-2026 08:00 - 09:00 899 MW
06-09-2026 09:00 - 10:00 899 MW
06-09-2026 10:00 - 11:00 899 MW
06-09-2026 11:00 - 12:00 899 MW
06-09-2026 12:00 - 13:00 899 MW
06-09-2026 13:00 - 14:00 899 MW
06-09-2026 14:00 - 15:00 899 MW
06-09-2026 15:00 - 16:00 899 MW
06-09-2026 16:00 - 17:00 899 MW
06-09-2026 17:00 - 18:00 899 MW
06-09-2026 18:00 - 19:00 899 MW
06-09-2026 19:00 - 20:00 899 MW
06-09-2026 20:00 - 21:00 899 MW
06-09-2026 21:00 - 22:00 899 MW
06-09-2026 22:00 - 23:00 899 MW
06-09-2026 23:00 - 24:00 899 MW
6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:
Thermal Limits
7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?
Capacity limitation due to unplanned maintenance
Capacity Curtailment on the FR-CH border for delivery period 24-08-2026
by JAO
1. TSO(s)*:
RTE-TSO
2. Identification of affected Long Term Transmission Rights:
FR-CH
3. Triggering event:
Curtailment to ensure operation remains within Operational Security Limits
4. Affected volume in MW / hour for each concerned period:
24-08-2026 00:00 - 01:00 370 MW
24-08-2026 01:00 - 02:00 370 MW
24-08-2026 02:00 - 03:00 370 MW
24-08-2026 03:00 - 04:00 370 MW
24-08-2026 04:00 - 05:00 370 MW
24-08-2026 05:00 - 06:00 370 MW
24-08-2026 06:00 - 07:00 370 MW
24-08-2026 07:00 - 08:00 370 MW
24-08-2026 08:00 - 09:00 370 MW
24-08-2026 09:00 - 10:00 370 MW
24-08-2026 10:00 - 11:00 370 MW
24-08-2026 11:00 - 12:00 370 MW
24-08-2026 12:00 - 13:00 370 MW
24-08-2026 13:00 - 14:00 370 MW
24-08-2026 14:00 - 15:00 370 MW
24-08-2026 15:00 - 16:00 370 MW
24-08-2026 16:00 - 17:00 370 MW
24-08-2026 17:00 - 18:00 370 MW
24-08-2026 18:00 - 19:00 370 MW
24-08-2026 19:00 - 20:00 370 MW
24-08-2026 20:00 - 21:00 370 MW
24-08-2026 21:00 - 22:00 370 MW
24-08-2026 22:00 - 23:00 370 MW
24-08-2026 23:00 - 24:00 370 MW
5. Amount of LTTR remaining after curtailment:
24-08-2026 00:00 - 01:00 0 MW
24-08-2026 01:00 - 02:00 0 MW
24-08-2026 02:00 - 03:00 0 MW
24-08-2026 03:00 - 04:00 0 MW
24-08-2026 04:00 - 05:00 0 MW
24-08-2026 05:00 - 06:00 0 MW
24-08-2026 06:00 - 07:00 0 MW
24-08-2026 07:00 - 08:00 0 MW
24-08-2026 08:00 - 09:00 0 MW
24-08-2026 09:00 - 10:00 0 MW
24-08-2026 10:00 - 11:00 0 MW
24-08-2026 11:00 - 12:00 0 MW
24-08-2026 12:00 - 13:00 0 MW
24-08-2026 13:00 - 14:00 0 MW
24-08-2026 14:00 - 15:00 0 MW
24-08-2026 15:00 - 16:00 0 MW
24-08-2026 16:00 - 17:00 0 MW
24-08-2026 17:00 - 18:00 0 MW
24-08-2026 18:00 - 19:00 0 MW
24-08-2026 19:00 - 20:00 0 MW
24-08-2026 20:00 - 21:00 0 MW
24-08-2026 21:00 - 22:00 0 MW
24-08-2026 22:00 - 23:00 0 MW
24-08-2026 23:00 - 24:00 0 MW
6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:
24/08/2026
00:00-01:00 Network Security
01:00-02:00 Network Security
02:00-03:00 Network Security
03:00-04:00 Network Security
04:00-05:00 Network Security
05:00-06:00 Network Security
06:00-07:00 Network Security
07:00-08:00 Network Security
08:00-09:00 Network Security
09:00-10:00 Network Security
10:00-11:00 Network Security
11:00-12:00 Network Security
12:00-13:00 Network Security
13:00-14:00 Network Security
14:00-15:00 Network Security
15:00-16:00 Network Security
16:00-17:00 Network Security
17:00-18:00 Network Security
18:00-19:00 Network Security
19:00-20:00 Network Security
20:00-21:00 Network Security
21:00-22:00 Network Security
22:00-23:00 Network Security
23:00-24:00 Network Security
7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?
The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits
*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication
Resource Center
This section contains key information for market participants such as user guides, forms, auction rules, nomination deadlines and other documents.
Our certifications
JAO has successfully implemented internationally recognized management systems and is now officially certified for ISO/IEC 27001:2022 – the global standard for Information Security Management Systems and for ISO 9001 – the international standard for Quality Management Systems.
About us
We started as a shared auction platform for transmission capacity across Central Western Europe in 2008. Over time, we became the operator of the Single Allocation Platform and therefore the leading trading platform for European Transmission System Operators.
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We created a user guide to support the onboarding of market participants. Learn more about the steps to register, the required documents and our service desk platform.
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