These entries are queried from radb.net using whois, you can try my project getting these.
:AS328356 route: 102.131.28.0/22 descr: Intelys Technology Africa (Pty) Ltd origin: AS328356 mnt-by: ITAL1-MNT changed: *** [at] intelys.com 20181008 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 102.131.28.0/24 descr: Intelys Technology Africa (Pty) Ltd origin: AS328356 mnt-by: ITAL1-MNT changed: *** [at] intelys.com 20200626 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 102.131.29.0/24 descr: Intelys Technology Africa (Pty) Ltd origin: AS328356 mnt-by: ITAL1-MNT changed: *** [at] intelys.com 20200626 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 102.131.30.0/24 descr: Intelys Technology Africa (Pty) Ltd origin: AS328356 mnt-by: ITAL1-MNT changed: *** [at] intelys.com 20200622 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 102.131.31.0/24 descr: Intelys Technology Africa (Pty) Ltd origin: AS328356 mnt-by: ITAL1-MNT changed: *** [at] intelys.com 20200626 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source