These entries are queried from radb.net using whois, you can try my project getting these.
:AS28974 route: 154.49.16.0/21 descr: Active Operations LLC origin: AS28974 mnt-by: COGENT-ROUTE-MNT created: 2015-02-20T10:57:20Z last-modified: 2018-09-04T18:05:00Z 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: 154.49.24.0/22 descr: Active Operations LLC origin: AS28974 mnt-by: COGENT-ROUTE-MNT created: 2015-02-20T10:57:20Z last-modified: 2018-09-04T18:05:00Z 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: 194.76.188.0/22 origin: AS28974 mnt-by: ACTIVEOPERATIONS-MNT created: 2018-06-18T16:23:41Z last-modified: 2018-06-18T16:23:41Z 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: 195.39.232.0/23 descr: Active Operations LLC descr: Ukraine origin: AS28974 mnt-by: ACTIVEOPERATIONS-MNT created: 2003-06-15T12:32:09Z last-modified: 2019-05-31T12:12:39Z 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