Domain Name Service (DNS) Sinkholing


DNS Sinkholing enables Enhanced Cybersecurity Services service providers to block access to specified malicious domain names. 

Eligibility & Enrollment

This is a service offered through the Enhanced Cybersecurity Services (ECS) program. All U.S.-based entities are eligible to enroll in ECS.

Program participation is voluntary and designed to protect government intelligence, corporate information security, and the privacy of participants. U.S.-based entities interested in participating or learning more about service-level options and agreements should contact an ECS service provider directly.

There is currently one provider accredited to offer Enhanced Cybersecurity Services: Viasat

Learn more about the ECS program:

Learn More


For general program information, contact For specific information about enrollment, pricing, or service options, please contact the ECS service provider listed above.