com zone: The server(s) responded over TCP with a malformed response or with an invalid RCODE. See RFC 1035, Sec. 4.1.1. (192.48.79.30)
Warnings (5)
com to coach.com: No response was received from the server over UDP (tried 6 times) until the COOKIE EDNS option was removed (however, this server appeared to respond legitimately to other queries with the COOKIE EDNS option present). See RFC 6891, Sec. 6.1.2. (192.54.112.30, UDP_-_EDNS0_4096_D_KN)
com to coach.com: No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (192.43.172.30, UDP_-_EDNS0_4096_D_KN)
com/DNSKEY (alg 13, id 19718): No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (192.48.79.30, UDP_-_EDNS0_4096_D_KN)
com/DNSKEY (alg 13, id 59354): No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (192.48.79.30, UDP_-_EDNS0_4096_D_KN)
coach.com/DS has warnings; select the "Denial of existence" DNSSEC option to see them.