1. 9.9.9.9
$ dig -t txt 233.15.0.37.zen.spamhaus.org @9.9.9.9 ; <<>> DiG 9.11.3-1ubuntu1.16-Ubuntu <<>> -t txt 233.15.0.37.zen.spamhaus.org @9.9.9.9 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16308 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1232 ; NSID: 72 65 73 31 30 30 2e 6e 72 74 2e 72 72 64 6e 73 2e 70 63 68 2e 6e 65 74 ("res100.nrt.rrdns.pch.net") ;; QUESTION SECTION: ;233.15.0.37.zen.spamhaus.org. IN TXT ;; ANSWER SECTION: 233.15.0.37.zen.spamhaus.org. 2100 IN TXT "Error: open resolver; https://www.spamhaus.org/returnc/pub/74.63.21.242" ;; Query time: 55 msec ;; SERVER: 9.9.9.9#53(9.9.9.9) ;; WHEN: Fri Mar 25 19:19:54 JST 2022 ;; MSG SIZE rcvd: 169