These entries are queried from radb.net using whois, you can try my project getting these.
:AS327768 route: 154.73.44.0/22 descr: SOMCAST-LLC origin: AS327768 mnt-by: SOMCAST-MNT changed: *** [at] somcast.so 20190718 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 154.73.44.0/24 descr: SOMCAST-LLC origin: AS327768 mnt-by: SOMCAST-MNT changed: *** [at] somcast.so 20201117 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 154.73.45.0/24 descr: SOMCAST-LLC origin: AS327768 mnt-by: SOMCAST-MNT changed: *** [at] somcast.so 20201117 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 154.73.46.0/24 descr: SOMCAST-LLC origin: AS327768 mnt-by: SOMCAST-MNT changed: *** [at] somcast.so 20200627 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 154.73.47.0/24 descr: SOMCAST-LLC origin: AS327768 mnt-by: SOMCAST-MNT changed: *** [at] somcast.so 20201117 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source