dns-sd(1) on macOS
The text 0b7d9791a047, as Mac OS X 10.4.11.x86, Mac OS X 10.4.11.ppc, Mac OS X 10.4.10.x86, Mac OS X 10.4.10.ppc, Mac OS X 10.4.9.x86, Mac OS X 10.4.9.ppc, Mac OS X 10.4.8.x86 shipped it.
Multicast DNS (mDNS) & DNS Service Discovery (DNS-SD) Test Tool