These entries are queried from radb.net using whois, you can try my project getting these.
:AS1887 route: 148.81.0.0/16 descr: WAWPOLIP origin: AS1887 mnt-by: AS1887-MNT created: 1970-01-01T00:00:00Z last-modified: 2001-09-22T09:31:53Z 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: valid route: 148.81.13.0/24 descr: NASK LAB origin: AS1887 mnt-by: NASK-MNT created: 2023-06-22T11:12:40Z last-modified: 2023-06-22T11:12:40Z 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 route: 148.81.100.0/24 descr: NASK LAB origin: AS1887 mnt-by: NASK-MNT created: 2023-06-22T15:01:38Z last-modified: 2023-06-22T15:01:38Z 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 route: 195.187.64.0/18 descr: NASK (PL) descr: Provider Local Registry origin: AS1887 notify: registry [at] nask.org.pl mnt-by: AS1887-MNT created: 1970-01-01T00:00:00Z last-modified: 2001-09-22T09:32:38Z 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: 2a00:1488::/32 descr: NASK-ACADEMIC-IPV6 origin: AS1887 notify: registry [at] nask.pl mnt-lower: NASK-MNT mnt-routes: NASK-MNT mnt-by: NASK-MNT created: 2010-11-25T15:40:17Z last-modified: 2010-11-25T15:40:17Z 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