No ANY records found for 21.210.29.
Try 210.29 instead?
id 38419, opcode QUERY, rcode NOTIMP, flags QR RD RA ;QUESTION 21.210.29. IN ANY ;ANSWER ;AUTHORITY ;ADDITIONAL
whatsmydns.net ANY Record Lookup tool lets you query DNS servers and get instant results.
Looking for easier to understand results? Use the Global DNS Checker tool.