These entries are queried from radb.net using whois, you can try my project getting these.
:AS20555 route: 213.135.44.0/22 descr: WIT autonomous system descr: Warsaw, Poland descr: WSISIZ-AS origin: AS20555 mnt-by: ICM-PL mnt-by: WSISIZ-MNT created: 1970-01-01T00:00:00Z last-modified: 2023-11-30T21:01:04Z 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: 213.135.48.0/23 descr: WIT autonomous system descr: Warsaw, Poland descr: WSISIZ-AS origin: AS20555 mnt-by: ICM-PL mnt-by: WSISIZ-MNT created: 2004-05-27T19:45:43Z last-modified: 2023-11-30T21:16:34Z 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: 2001:1a68:a::/48 descr: WSISIZ origin: AS20555 mnt-by: ATMAN-MNT mnt-by: WSISIZ-MNT created: 2008-02-08T12:15:47Z last-modified: 2008-02-08T12:15:47Z 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