This is awesome but I'm getting NXDOMAIN when I try to use it. Am I doing something wrong, perhaps something to do with EDNS? $ dig 42km-mi.unit @dns.toys

This is awesome but I'm getting NXDOMAIN when I try to use it. Am I doing something wrong, perhaps something to do with EDNS? $ dig 42km-mi.unit @dns.toys ; <<>> DiG 9.16.27-Debian <<>> @dns.toys 42km-mi.unit ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 2059 ;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ; COOKIE: efe3c6f9e0b6e4da56aba44d62a4e63ba7a19bed262b0e1a (good) ;; QUESTION SECTION: ;42km-mi.unit. IN A ;; AUTHORITY SECTION: . 6959 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2022061100 1800 900 604800 86400 ;; Query time: 44 msec ;; SERVER: 138.197.68.199#53(138.197.68.199) ;; WHEN: Sat Jun 11 14:00:11 CDT 2022 ;; MSG SIZE rcvd: 144