No ANY records found for 251.198.199.
Try 198.199 instead?
id 672, opcode QUERY, rcode NXDOMAIN, flags QR RD RA ;QUESTION 251.198.199. IN ANY ;ANSWER ;AUTHORITY . 86341 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2024111001 1800 900 604800 86400 ;ADDITIONAL
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