These entries are queried from radb.net using whois, you can try my project getting these.
:AS327981 route: 169.239.16.0/22 descr: route-obj angola cables origin: AS327981 mnt-by: EKOVOLT-MNT changed: *** [at] ekovolt.com 20190405 source: AFRINIC rpki-ov-state: valid route: 169.239.16.0/22 descr: Ekovolt c/o Internet Solutions origin: AS327981 mnt-by: MAINT-AS3741 changed: nielk [at] is.co.za 20200509 source: RADB last-modified: 2023-11-13T16:00:39Z rpki-ov-state: valid route: 169.239.16.0/24 origin: AS327981 descr: 16-subnet mnt-by: EKOVOLT-MNT changed: *** [at] ekovolt.com 20231001 source: AFRINIC rpki-ov-state: valid route: 169.239.17.0/24 origin: AS327981 descr: small-for-routing mnt-by: EKOVOLT-MNT changed: *** [at] ekovolt.com 20230706 source: AFRINIC rpki-ov-state: valid route: 169.239.18.0/24 origin: AS327981 descr: new-route mnt-by: EKOVOLT-MNT changed: *** [at] ekovolt.com 20231001 source: AFRINIC rpki-ov-state: valid