These entries are queried from radb.net using whois, you can try my project getting these.
:AS328792 route: 102.221.52.0/22 descr: Route Object origin: AS328792 mnt-by: EEID-MNT changed: *** [at] emis.co.ao 20210412 source: AFRINIC rpki-ov-state: valid route: 102.221.52.0/24 descr: Route Object origin: AS328792 mnt-by: EEID-MNT changed: *** [at] emis.co.ao 20210805 source: AFRINIC rpki-ov-state: valid route: 102.221.53.0/24 descr: Route Object origin: AS328792 mnt-by: EEID-MNT changed: *** [at] emis.co.ao 20210805 source: AFRINIC rpki-ov-state: valid route: 102.221.55.0/24 origin: AS328792 descr: Angola Cables AS328792 Inserido pela API mnt-by: MAINT-AS37468 changed: noc [at] angolacables.co.ao 20230808 #07:02:19Z source: RADB last-modified: 2023-11-13T16:17:57Z rpki-ov-state: valid route: 102.221.55.0/24 descr: Route Object origin: AS328792 mnt-by: EEID-MNT changed: *** [at] emis.co.ao 20210805 source: AFRINIC rpki-ov-state: valid route6: 2c0f:5600::/32 descr: Route Object origin: AS328792 mnt-by: EEID-MNT changed: *** [at] emis.co.ao 20210412 changed: *** [at] emis.co.ao 20210503 source: AFRINIC rpki-ov-state: valid