These entries are queried from radb.net using whois, you can try my project getting these.
:AS50962 route: 31.177.8.0/21 descr: Roventa-NET origin: AS50962 mnt-by: MNT-ROVENTA created: 2011-03-14T09:00:48Z last-modified: 2011-03-14T09:00:48Z 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: 178.19.16.0/20 descr: Roventa-NET origin: AS50962 mnt-by: MNT-ROVENTA created: 2010-05-05T11:36:40Z last-modified: 2010-05-05T11:36:40Z 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: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2a01:8700::/32 descr: Roventa IPv6 block origin: AS50962 mnt-by: MNT-ROVENTA created: 2013-06-18T12:47:13Z last-modified: 2013-06-18T12:47:13Z 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: not_found # No ROAs found, or RPKI validation not enabled for source