nl zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (2001:678:20::24, 2620:10a:80ac::200)
servfail.nl zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (2a01:7c8:f:c1f::195, 2a01:7c8:7000:195::195)
servfail.nl/NS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2a01:7c8:f:c1f::195, 2a01:7c8:7000:195::195, UDP_-_NOEDNS_)
servfail.nl/A has errors; select the "Denial of existence" DNSSEC option to see them.