tnat64(1) on Linux
The text f1c0d498a692, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it. The page shows this text now.
Shell wrapper to simplify the use of the tnat64(8) library to transparently allow an application to connect to IPv4 hosts via NAT64 on IPv6-only systems when the application doesn't support IPv6 itself.