These entries are queried from radb.net using whois, you can try my project getting these.
:AS51448 route: 91.217.42.0/23 descr: Uralskie Kabelnye Seti Ltd. Verkhny Ufaley origin: AS51448 mnt-by: URALCABEL-MNT created: 2010-11-25T09:30:53Z last-modified: 2010-11-25T09:30:53Z 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 route6: 2a0a:340:1800::/40 origin: AS51448 mnt-by: ru-uks-1-mnt created: 2021-04-26T10:07:15Z last-modified: 2021-04-26T10:07:15Z 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 route6: 2a0a:340:d900::/40 origin: AS51448 mnt-by: ru-uks-1-mnt created: 2021-04-26T10:07:53Z last-modified: 2021-04-26T10:07:53Z 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