BIND (Berkeley Internet Name Domain or "named") is the most commonly used DNS server on the Internet, especially on Unix-like systems, where it is a de facto standard. Supported by Internet Systems Consortium, BIND was originally created by four graduate students with CSRG at the University of California, Berkeley and first released with 4.3BSD. Paul Vixie started maintaining it in 1988 while working for DEC.

A new version of BIND (BIND 9) was written from scratch in part to address the architectural difficulties with auditing the earlier BIND code bases, and also to support DNSSEC (DNS Security Extensions).