These entries are queried from radb.net using whois, you can try my project getting these.
:AS16350 route: 185.6.160.0/22 descr: Root ISP descr: Enschede, The Netherlands origin: AS16350 notify: hostmaster [at] root.nl mnt-by: ROOTNL-MNT created: 2012-10-18T18:44:39Z last-modified: 2020-02-04T12:38:44Z 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: 217.119.224.0/20 descr: Root B.V. descr: Enschede, The Netherlands origin: AS16350 notify: hostmaster [at] root.nl mnt-by: ROOTNL-MNT created: 1970-01-01T00:00:00Z last-modified: 2020-02-04T12:39:09Z 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: 2a02:1398::/32 descr: Root IPv6 network descr: Root B.V. descr: Enschede, The Netherlands origin: AS16350 mnt-by: ROOTNL-MNT created: 2011-02-09T11:13:51Z last-modified: 2020-02-04T12:39:41Z 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