com.cn zone: The server(s) were not responsive to queries over TCP. See RFC 1035, Sec. 4.2. (2001:250:c006::44)
com.cn/SOA: No response was received from the server over TCP (tried 3 times). See RFC 1035, Sec. 4.2. (2001:250:c006::44, TCP_-_EDNS0_4096_D_N)
com.cn/A has errors; select the "Denial of existence" DNSSEC option to see them.
com.cn/MX has errors; select the "Denial of existence" DNSSEC option to see them.
com.cn/TXT has errors; select the "Denial of existence" DNSSEC option to see them.
com.cn/CNAME has errors; select the "Denial of existence" DNSSEC option to see them.
y7580sexug.com.cn/A has errors; select the "Denial of existence" DNSSEC option to see them.
com.cn/AAAA has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (8)
. to cn: Authoritative AAAA records exist for ns.cernet.net, but there are no corresponding AAAA glue records. See RFC 1034, Sec. 4.2.2.
. to cn: The glue address(es) for ns.cernet.net (202.112.0.44) differed from its authoritative address(es) (103.137.60.44, 202.112.0.44). See RFC 1034, Sec. 4.2.2.
com.cn/A has warnings; select the "Denial of existence" DNSSEC option to see them.
com.cn/MX has warnings; select the "Denial of existence" DNSSEC option to see them.
com.cn/TXT has warnings; select the "Denial of existence" DNSSEC option to see them.
com.cn/CNAME has warnings; select the "Denial of existence" DNSSEC option to see them.
y7580sexug.com.cn/A has warnings; select the "Denial of existence" DNSSEC option to see them.
com.cn/AAAA has warnings; select the "Denial of existence" DNSSEC option to see them.