These entries are queried from radb.net using whois, you can try my project getting these.
:AS6772 route: 31.11.0.0/19 descr: ImproWare AG descr: Switzerland origin: AS6772 mnt-by: IMPNET-MNT mnt-lower: IMPNET-MNT created: 2011-05-03T13:49:59Z last-modified: 2011-05-03T13:49:59Z 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: 87.102.128.0/17 descr: ImproWare AG descr: Switzerland origin: AS6772 mnt-by: IMPNET-MNT mnt-lower: IMPNET-MNT created: 2005-10-19T10:16:41Z last-modified: 2005-10-19T10:16:41Z 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 route: 157.161.0.0/16 descr: ImproWare AG descr: Switzerland origin: AS6772 mnt-by: IMPNET-MNT created: 2001-11-01T14:45:09Z last-modified: 2001-11-01T14:45:09Z 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 route: 185.68.64.0/22 descr: ImproWare AG descr: Switzerland origin: AS6772 mnt-by: IMPNET-MNT created: 2015-01-12T16:29:18Z last-modified: 2015-01-12T16:29:18Z 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: 194.56.208.0/23 descr: Basler Verkehrs-Betriebe descr: Switzerland origin: AS6772 mnt-by: IMPNET-MNT created: 2004-02-28T16:25:35Z last-modified: 2004-02-28T16:25:35Z 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: 213.188.224.0/19 descr: ImproWare AG descr: Switzerland origin: AS6772 mnt-by: IMPNET-MNT mnt-lower: IMPNET-MNT created: 2003-03-20T09:02:30Z last-modified: 2003-03-20T09:02:30Z 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: 2001:4060::/32 descr: CH-IMPROWARE-IP6BLK1 descr: Switzerland origin: AS6772 mnt-by: IMPNET-MNT mnt-lower: IMPNET-MNT created: 2005-01-06T15:33:15Z last-modified: 2005-01-06T15:33:15Z 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