DNS
How to Check Domain’s Nameservers
nslookup -type=ns yourdomain.tld
dig ns yourdomain.tld
How to check DNS record
dig yourdomain.tld +nostats +nocomments +nocmd
chinadns
curl 'http://ftp.apnic.net/apnic/stats/apnic/delegated-apnic-latest' | grep ipv4 | grep CN | awk -F\| '{ printf("%s/%d\n", $4, 32-log($5)/log(2)) }' > chnroute.txt
chinadns -c chnroute.txt -s 223.5.5.5,119.29.29.29,208.67.222.222:443,8.8.8.8