These entries are queried from radb.net using whois, you can try my project getting these.
:AS328562 route: 102.23.144.0/20 descr: route origin: AS328562 mnt-by: SC5-MNT changed: *** [at] swift-connect.co.za 20191025 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 102.23.144.0/21 descr: route origin: AS328562 mnt-by: SC5-MNT changed: *** [at] kurlec.co.za 20200529 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 102.23.144.0/22 descr: route origin: AS328562 mnt-by: SC5-MNT changed: *** [at] kurlec.co.za 20200623 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 102.23.148.0/22 descr: route origin: AS328562 mnt-by: SC5-MNT changed: *** [at] kurlec.co.za 20200623 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 102.23.152.0/21 descr: route origin: AS328562 mnt-by: SC5-MNT changed: *** [at] kurlec.co.za 20200623 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 102.23.152.0/22 descr: route origin: AS328562 mnt-by: SC5-MNT changed: *** [at] kurlec.co.za 20200623 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 102.23.156.0/22 descr: route origin: AS328562 mnt-by: SC5-MNT changed: *** [at] kurlec.co.za 20200623 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source