Unbound (DNS server)

Unbound

Developer(s)	NLnet Labs
Initial release	February 19, 2007; 17 years ago (2007-02-19)
Stable release	1.22.0[1]  / 17 October 2024; 5 days ago (17 October 2024)
Repository	Unbound by NLnetLabs on GitHub
Written in	C
Operating system	Unix-like, Windows
Type	DNS server
License	BSD license
Website	unbound.net

Unbound is a validating, recursive, and caching DNS resolver product from NLnet Labs. It is distributed free of charge in open-source form under the BSD license.