arpa/SOA: The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (2001:500:2f::f, TCP_-_EDNS0_4096_D_KN)
arpa/CNAME has warnings; select the "Denial of existence" DNSSEC option to see them.
ob3lm.k7orv.arpa/A has warnings; select the "Denial of existence" DNSSEC option to see them.