These entries are queried from radb.net using whois, you can try my project getting these.
:AS51863 route: 91.224.216.0/23 descr: GIGA-NET descr: GIGA Komputer Ilona Skupien origin: AS51863 notify: registry [at] nask.pl mnt-by: NASK2-MNT mnt-by: MNT-GIGAKOMPUTER created: 2011-05-16T07:25:01Z last-modified: 2014-02-26T09:55:22Z 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: 185.48.28.0/22 descr: GIGA-NET-IPV4 origin: AS51863 mnt-by: MNT-GIGAKOMPUTER created: 2014-02-28T15:00:22Z last-modified: 2014-02-28T15:00:22Z 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: 2a01:8f20::/32 descr: GIGA-NET-IPV6 origin: AS51863 mnt-by: MNT-GIGAKOMPUTER created: 2014-02-28T14:50:22Z last-modified: 2014-02-28T14:50:22Z 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: 2a10:f781:10:b854::/64 origin: AS51863 descr: EPIX-LORA-GIGAKOMP mnt-by: EPOLUDNIE-MNT mnt-by: EPOLUDNIE-MP-MNT mnt-lower: EPOLUDNIE-MNT mnt-lower: EPOLUDNIE-MP-MNT created: 2022-05-16T07:02:09Z last-modified: 2022-05-16T07:02:09Z 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