These entries are queried from radb.net using whois, you can try my project getting these.
:AS328607 route: 192.231.237.0/24 descr: BCX origin: AS328607 mnt-by: BCT1-MNT changed: *** [at] bcx.co.tz 20210920 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.231.237.0/24 origin: AS328607 descr: Proxy-registered route object VTL Client mnt-by: MAINT-AS36994 changed: ashwin.lalla [at] vodacom.co.za 20200415 #11:46:54Z source: RADB last-modified: 2023-11-13T16:00:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source