No ANY records found for 23.15.7.166.
Try 15.7.166 instead?
id 19759, opcode QUERY, rcode NXDOMAIN, flags QR RD RA ;QUESTION 23.15.7.166. IN ANY ;ANSWER ;AUTHORITY . 86386 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2024112301 1800 900 604800 86400 ;ADDITIONAL
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