These entries are queried from radb.net using whois, you can try my project getting these.
:AS16083 route: 81.16.208.0/22 descr: Stack Ltd origin: AS16083 mnt-by: STACK-MNT created: 2018-08-17T11:04:31Z last-modified: 2018-08-17T11:04:31Z 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 route: 91.106.112.0/21 descr: Stack Ltd origin: AS16083 notify: noc [at] stack.net mnt-by: STACK-MNT created: 2018-08-13T15:09:02Z last-modified: 2018-08-13T15:09:02Z source: RIPE org: ORG-SL20-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: 91.106.112.0/22 descr: StackNet Service, LLC origin: AS16083 mnt-by: MNT-SDN notify: noc [at] stack.net created: 2012-08-02T09:09:25Z last-modified: 2015-04-17T07:52:41Z 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: valid route: 91.106.112.0/24 descr: StackNet Service, LLC origin: AS16083 mnt-by: MNT-SDN notify: noc [at] stack.net created: 2012-08-02T09:10:25Z last-modified: 2015-04-17T08:56:38Z 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: 91.106.113.0/24 descr: Stack Data Network origin: AS16083 mnt-by: MNT-SDN notify: noc [at] stack.net created: 2012-08-02T09:10:25Z last-modified: 2014-10-16T11:55:22Z 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: 91.106.114.0/24 descr: Stack Data Network origin: AS16083 mnt-by: MNT-SDN notify: noc [at] stack.net created: 2012-08-02T09:10:25Z last-modified: 2014-10-16T11:55:54Z 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: 91.106.115.0/24 descr: Stack Data Network origin: AS16083 mnt-by: MNT-SDN notify: noc [at] stack.net created: 2012-08-02T09:10:25Z last-modified: 2014-10-16T11:56:20Z 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 route: 178.209.192.0/19 descr: Stack Ltd origin: AS16083 mnt-by: STACK-MNT created: 2010-10-01T08:32:58Z last-modified: 2010-10-01T08:32:58Z 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: 217.73.192.0/20 descr: Stack Ltd origin: AS16083 notify: noc [at] stack.net mnt-by: STACK-MNT created: 1970-01-01T00:00:00Z last-modified: 2001-09-22T09:33:35Z 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: valid route6: 2a00:eb9::/32 descr: StackNet Service, LLC IPV6 origin: AS16083 mnt-by: MNT-SDN notify: noc [at] stack.net created: 2020-04-22T15:43:57Z last-modified: 2020-04-22T15:43:57Z 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