nl zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (2001:678:20::24, 2001:678:2c:0:194:0:28:53, 2620:10a:80ac::200)
nl/DS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2001:500:1::53, 2001:500:12::d0d, 2001:500:200::b, 2001:503:ba3e::2:30, UDP_-_NOEDNS_)
nl/NS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2001:500:1::53, 2001:500:12::d0d, 2001:500:200::b, 2001:503:ba3e::2:30, 2001:678:20::24, 2001:678:2c:0:194:0:28:53, 2620:10a:80ac::200, UDP_-_NOEDNS_)
nl/DS has errors; select the "Denial of existence" DNSSEC option to see them.