sorbs.net zone: The server(s) responded over TCP with a malformed response or with an invalid RCODE. See RFC 1035, Sec. 4.1.1. (113.52.8.11)
sorbs.net zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (74.208.148.146, 87.106.246.125, 169.48.121.207, 208.43.31.57, 208.43.227.204, 210.50.3.172)
sorbs.net/NS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (74.208.148.146, 87.106.246.125, 169.48.121.207, 208.43.31.57, 208.43.227.204, 210.50.3.172, UDP_-_NOEDNS_)
sorbs.net/SOA: The response had an invalid RCODE (SERVFAIL). See RFC 1035, Sec. 4.1.1. (113.52.8.11, TCP_-_NOEDNS_)
sorbs.net/A has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (2)
net to sorbs.net: The following NS name(s) were found in the authoritative NS RRset, but not in the delegation NS RRset (i.e., in the net zone): ns10.sorbs.net, ns3.sorbs.net, ns6.sorbs.net, ns7.sorbs.net, ns8.sorbs.net, ns11.sorbs.net See RFC 1034, Sec. 4.2.2.
net to sorbs.net: The glue address(es) for ns9.sorbs.net (208.43.31.57) differed from its authoritative address(es) (169.48.121.207). See RFC 1034, Sec. 4.2.2.