These entries are queried from radb.net using whois, you can try my project getting these.
:AS50994 route: 87.239.168.0/21 descr: SBLinternet.pl origin: AS50994 mnt-by: ESBL_MNT mnt-by: BACZAN_MNT mnt-by: lir-pl-beskidmedia-1-MNT created: 2010-09-06T11:20:12Z last-modified: 2024-02-09T11:49:48Z 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: 178.218.224.0/20 descr: SBLinternet.pl origin: AS50994 mnt-by: ESBL_MNT mnt-by: BACZAN_MNT mnt-by: lir-pl-beskidmedia-1-MNT created: 2010-05-11T07:23:52Z last-modified: 2024-02-09T11:49:23Z 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: 2a02:4a40:108::/48 descr: e-SBL v6 Route origin: AS50994 mnt-by: ESBL_MNT mnt-by: BACZAN_MNT mnt-by: lir-pl-beskidmedia-1-MNT created: 2019-07-19T19:12:57Z last-modified: 2024-02-09T11:50:08Z 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: valid route6: 2a10:f781:10:e92f::/64 origin: AS50994 descr: EPIX-LORA-ESBL mnt-by: EPOLUDNIE-MNT mnt-by: EPOLUDNIE-MP-MNT mnt-lower: EPOLUDNIE-MNT mnt-lower: EPOLUDNIE-MP-MNT created: 2022-05-16T07:01:12Z last-modified: 2022-05-16T07:01:12Z 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