belgium.be/A: 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. (2600:1480:1::41, UDP_-_EDNS0_4096_D_KN)
belgium.be/CNAME has warnings; select the "Denial of existence" DNSSEC option to see them.
belgium.be/CDS has warnings; select the "Denial of existence" DNSSEC option to see them.
vz1u9.czq04.belgium.be/A has warnings; select the "Denial of existence" DNSSEC option to see them.