These entries are queried from radb.net using whois, you can try my project getting these.
:AS56712 route: 91.226.228.0/22 descr: SUMERNET, Stryszawa origin: AS56712 mnt-by: SUMERNET-MNT created: 2011-06-13T09:19:49Z last-modified: 2011-06-13T09:19:49Z 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: 185.152.76.0/22 origin: AS56712 mnt-by: pl-sumernet-1-mnt mnt-by: SUMERNET-MNT created: 2018-03-02T11:18:57Z last-modified: 2018-05-23T10:29:03Z source: RIPE descr: SUMERNET, Stryszawa 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:f781:10:20dd::/64 origin: AS56712 descr: EPIX-LORA-SUMERNETS mnt-by: EPOLUDNIE-MNT mnt-by: EPOLUDNIE-MP-MNT mnt-lower: EPOLUDNIE-MNT mnt-lower: EPOLUDNIE-MP-MNT created: 2022-05-16T06:44:05Z last-modified: 2022-05-16T06:44:05Z 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