ALL A AAAA CAA CNAME MX NS PTR SOA SRV TXT ANY

No ANY records found for 21.15.72.

Try 15.72 instead?

id 15791, opcode QUERY, rcode NXDOMAIN, flags QR RD RA
;QUESTION
21.15.72. IN ANY
;ANSWER
;AUTHORITY
. 86367 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2025050700 1800 900 604800 86400
;ADDITIONAL

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