These entries are queried from radb.net using whois, you can try my project getting these.
:AS51999 route: 136.175.224.0/22 origin: AS51999 descr: Route 136.175.224.000/22 AS51999 admin-c: WSC55-ARIN tech-c: WHITE2739-ARIN mnt-by: MNT-WSC-141 created: 2021-11-22T12:48:49Z last-modified: 2021-11-22T12:48:49Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 165.140.8.0/22 origin: AS51999 descr: Route 165.140.8.000/22 AS51999 admin-c: WHITE2739-ARIN tech-c: WHITE2739-ARIN mnt-by: MNT-WHITE-114 created: 2022-01-07T00:57:09Z last-modified: 2022-01-07T00:57:09Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2602:fbe9::/36 origin: AS51999 descr: Route 2602:FBE9:000:000:000:000:000:000/36 AS51999 admin-c: WHITE2739-ARIN tech-c: WHITE2739-ARIN mnt-by: MNT-WHITE-114 created: 2022-01-07T15:45:57Z last-modified: 2022-01-07T15:45:57Z source: ARIN rpki-ov-state: valid route6: 2602:fc01::/36 origin: AS51999 descr: 2602:FC01::/36 AS51999 admin-c: CCD6-ARIN tech-c: CCD6-ARIN mnt-by: MNT-DD-567 created: 2021-12-03T21:20:42Z last-modified: 2021-12-03T21:20:42Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2602:fcb5::/36 origin: AS51999 descr: MILE Inc. admin-c: CEONO-ARIN tech-c: CEONO-ARIN mnt-by: MNT-MILEI created: 2021-04-14T21:42:14Z last-modified: 2021-04-14T21:42:14Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2602:fcf6::/36 origin: AS51999 descr: MNT-WSC-141 route 2602:FCF6:0000:0000:0000:0000:0000:0000/36 AS51999 admin-c: WSC55-ARIN tech-c: WHITE2739-ARIN mnt-by: MNT-WSC-141 created: 2020-10-20T22:50:12Z last-modified: 2021-03-08T15:46:59Z source: ARIN rpki-ov-state: valid route6: 2a0b:b83::/48 descr: WhiteHat origin: AS51999 mnt-by: WHITEHAT notify: unread [at] whitehat.ro created: 2020-09-03T07:24:14Z last-modified: 2020-09-03T07:24:14Z 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