These entries are queried from radb.net using whois, you can try my project getting these.
:AS36976 route: 41.223.164.0/22 descr: SONANGOL origin: AS36976 mnt-by: SONANGOL-MNT mnt-lower: SONANGOL-MNT created: 2014-01-22T15:28:48Z last-modified: 2018-09-04T17:50:47Z 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: 41.223.164.0/24 descr: Sonangol origin: AS36976 mnt-by: SONANGOL-MNT mnt-lower: SONANGOL-MNT created: 2012-09-06T08:09:27Z last-modified: 2018-09-04T17:15:25Z 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: 41.223.165.0/24 descr: Sonangol origin: AS36976 mnt-by: SONANGOL-MNT mnt-lower: SONANGOL-MNT created: 2012-09-07T10:01:14Z last-modified: 2018-09-04T17:16:12Z 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