These entries are queried from radb.net using whois, you can try my project getting these.
:AS37147 route: 196.46.21.0/24 descr: Banco BIC S.A. - Angola origin: AS37147 mnt-by: BCCBAOLU-MNT created: 2010-06-25T09:55:59Z last-modified: 2018-09-04T16:19:33Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 196.46.21.0/24 origin: AS37147 descr: Banco BIC S.A. descr: IPv4 Network #1 mnt-by: BCCBAOLU-MNT changed: *** [at] takesignal.com 20210511 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source