These entries are queried from radb.net using whois, you can try my project getting these.
:AS37051 route: 196.216.163.0/24 descr: Government of Botswana origin: AS37051 mnt-by: Internet-Support changed: *** [at] gov.bw 20170927 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 196.216.163.0/25 descr: Government of Botswana origin: AS37051 mnt-by: Internet-Support changed: *** [at] gov.bw 20170928 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 196.216.163.128/25 descr: Government of Botswana origin: AS37051 mnt-by: Internet-Support changed: *** [at] gov.bw 20170928 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source