These entries are queried from radb.net using whois, you can try my project getting these.
:AS15821 route: 193.41.4.0/23 descr: Astral-Kiev origin: AS15821 notify: ripe-nfy [at] astral.kiev.ua mnt-by: ASTRAL-MNT created: 1970-01-01T00:00:00Z last-modified: 2001-09-22T09:33:27Z source: RIPE 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: 193.41.4.0/24 descr: JV "Astral-Kiev", backbone origin: AS15821 notify: ripe-nfy [at] astral.kiev.ua mnt-by: ASTRAL-MNT created: 2002-10-11T13:08:40Z last-modified: 2002-10-11T13:08:40Z source: RIPE 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: 193.41.5.0/24 descr: JV "Astral-Kiev", clients origin: AS15821 notify: ripe-nfy [at] astral.kiev.ua mnt-by: ASTRAL-MNT created: 2002-10-11T13:12:56Z last-modified: 2002-10-11T13:12:56Z source: RIPE 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