edu.sg to sp.edu.sg: No valid RRSIGs made by a key corresponding to a DS RR were found covering the DNSKEY RRset, resulting in no secure entry point (SEP) into the zone. See RFC 4035, Sec. 2.2, RFC 6840, Sec. 5.11. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, UDP_-_EDNS0_4096_D_KN)
edu.sg to sp.edu.sg: The DS RRset for the zone included algorithm 8 (RSASHA256), but no DS RR matched a DNSKEY with algorithm 8 that signs the zone's DNSKEY RRset. See RFC 4035, Sec. 2.2, RFC 6840, Sec. 5.11. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, UDP_-_EDNS0_4096_D_KN)
sp.edu.sg/A: No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, UDP_-_EDNS0_4096_D_KN)
sp.edu.sg/AAAA: No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, UDP_-_EDNS0_4096_D_KN)
sp.edu.sg/DNSKEY (alg 8, id 11131): No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, UDP_-_EDNS0_4096_D_KN)
sp.edu.sg/DNSKEY (alg 8, id 13933): No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, UDP_-_EDNS0_4096_D_KN)
sp.edu.sg/DNSKEY (alg 8, id 59401): No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, UDP_-_EDNS0_4096_D_KN)
sp.edu.sg/DNSKEY (alg 8, id 62593): No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, UDP_-_EDNS0_4096_D_KN)
sp.edu.sg/DNSKEY (alg 8, id 62593): The key was revoked but was not found signing the RRset. See RFC 5011, Sec. 2.1. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, UDP_-_EDNS0_4096_D_KN)
sp.edu.sg/DNSKEY (alg 8, id 65479): No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, UDP_-_EDNS0_4096_D_KN)
sp.edu.sg/MX: No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, TCP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_512_D_KN)
sp.edu.sg/NS: No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, UDP_-_EDNS0_4096_D_KN)
sp.edu.sg/NSEC3PARAM: No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, TCP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN)
sp.edu.sg/SOA: No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, TCP_-_EDNS0_4096_D_KN, TCP_-_EDNS0_4096_D_N, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)
sp.edu.sg/TXT: No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, TCP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN)
sp.edu.sg/DNSKEY has errors; select the "Denial of existence" DNSSEC option to see them.
rdmknfhgi7.sp.edu.sg/A has errors; select the "Denial of existence" DNSSEC option to see them.
sp.edu.sg/CNAME has errors; select the "Denial of existence" DNSSEC option to see them.