These entries are queried from radb.net using whois, you can try my project getting these.
:AS203421 route: 62.3.52.0/24 origin: AS203421 mnt-by: uk-balticbroadband-1-mnt created: 2021-11-24T20:37:08Z last-modified: 2021-11-24T20:37:08Z 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 route: 185.135.104.0/22 descr: Baltic Broadband Limited origin: AS203421 mnt-by: uk-balticbroadband-1-mnt created: 2016-02-26T17:24:51Z last-modified: 2019-10-16T17:57:13Z 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: 193.160.188.0/22 origin: AS203421 mnt-by: uk-balticbroadband-1-mnt created: 2019-10-16T18:00:08Z last-modified: 2019-10-16T18:00:08Z 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: 2a06:f300::/29 descr: Telecoms Cloud origin: AS203421 mnt-by: uk-telecomscloudnetworks-1-mnt created: 2016-05-05T09:21:34Z last-modified: 2016-05-05T09:21:34Z 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