No ANY records found for 47.21.36.
Try 21.36 instead?
id 15177, opcode QUERY, rcode NXDOMAIN, flags QR RD RA ;QUESTION 47.21.36. IN ANY ;ANSWER ;AUTHORITY . 86388 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2024051800 1800 900 604800 86400 ;ADDITIONAL
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