These entries are queried from radb.net using whois, you can try my project getting these.
:AS211210 route: 37.252.221.0/24 origin: AS211210 mnt-by: mrdtr-mnt created: 2021-06-07T08:50:20Z last-modified: 2021-06-07T08:50:20Z 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: 2a0b:96c0::/29 origin: AS211210 mnt-by: mrdtr-mnt created: 2021-06-07T08:53:19Z last-modified: 2021-06-07T08:53:31Z 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