B Root

B Root

The B-Root Domain-Name-Server is operated the University of Southern California by the Networking and Cybersecurity Division at the Information Sciences Institute working with USC’s Information Technology Services.

B Root provides root DNS service at (IPv4) and 2001:500:200::b (IPv6), operating as b.root-servers.net. We operate from several points-of-presence around the world.

B Root is operated as a public service to the Internet. As a research university, we also support research.

USC/ISI has provided root DNS service since the inception of the DNS in 1987 (more history).


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About our data: RSSAC-002 data (details).

Thanks and support and history.

Statements on DNS Data Sharing, Operational Principles, Research, Responses, RSSAC001 Compliance