European TLD ISAC, supported by CENTR
secretariat@tld-isac.eu
+32 2.627.5550

Structure & members

TLD ISAC members

The members of the European TLD ISAC are:

  • Afnic, the ccTLD registry for .fr
  • CENTR, the association of European ccTLD registries
  • Denic, the ccTLD registry for .de
  • DNS Belgium, the ccTLD registry for .be
  • EURid, the ccTLD registry for .eu
  • Internetstiftelsen, the ccTLD registry for .se
  • .IE, the ccTLD registry for .ie
  • Nic.at, the ccTLD registry for .at
  • Nominet, the ccTLD registry for .uk
  • .PT, the ccTLD registry for .pt
  • Punktum dk, the ccTLD registry for .dk
  • Red.es, the ccTLD registry for .es
  • Register.si, the ccTLD registry for .si
  • SIDN, the ccTLD registry for .nl
  • SK-NIC, the ccTLD registry for .sk
  • Switch, the ccTLD registry for .ch


Structure and Functioning of the European TLD ISAC

The European TLD Information Sharing and Analysis Centre (TLD ISAC) is a collaborative platform established under CENTR to strengthen the cyber resilience of top-level domain (TLD) registry operators. It facilitates trusted information exchange, threat analysis, and capacity building across the DNS ecosystem.

Structure and Membership
TLD ISAC membership is open to all full members of CENTR. Any non-suspended full CENTR member can apply to become member of the European TLD ISAC. If there are no objections, the applicant becomes member of the European TLD ISAC after payment of the membership fee. Each member appoints a representative to the TLD ISAC Member Assembly, the main decision-making body. Members collaborate via Special Interest Groups (SIGs), projects, and shared tools.

Governance
The TLD ISAC is overseen by a Steering Committee elected by the Member Assembly. The Committee provides strategic direction, approves initiatives, and monitors progress. It consist of 3 to 7 individuals from the members, each with a diverse set of competences relevant to managing the European TLD ISAC.

Operational Components

  • Special Interest Groups (SIGs): Temporary expert groups focused on specific cybersecurity topics. Each SIG is led by an elected Chair and operates for one year, renewable based on performance and relevance.

  • Projects: Collaborative efforts delivering concrete outputs such as reports or tools. Projects may be included in the annual work plan or run independently with external funding.

  • Tools: Digital or physical platforms supporting secure collaboration and information sharing.

Confidentiality and Ethics
All activities adhere to strict confidentiality standards under the Traffic Light Protocol (TLP). Members are expected to act ethically, avoid conflicts of interest, and contribute constructively.

Support

CENTR provides management, administrative and logistical support, ensuring alignment with broader goals and the integration of TLD ISAC activities into CENTR's mission.