No ANY records found for 31.169.81.226.
Try 169.81.226 instead?
id 5660, opcode QUERY, rcode NXDOMAIN, flags QR RD RA ;QUESTION 31.169.81.226. IN ANY ;ANSWER ;AUTHORITY . 86387 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2024122501 1800 900 604800 86400 ;ADDITIONAL
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