These entries are queried from radb.net using whois, you can try my project getting these.
:AS31143 route: 87.252.225.0/24 descr: DELEGATED origin: AS31143 mnt-by: BYGIS-MNT created: 2006-10-02T14:51:39Z last-modified: 2007-05-10T10:15:46Z 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: 87.252.227.0/24 descr: DELEGATED origin: AS31143 mnt-by: BYGIS-MNT created: 2007-05-10T10:15:47Z last-modified: 2007-05-10T10:15:47Z 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: 87.252.235.0/24 descr: DELEGATED origin: AS31143 mnt-by: BYGIS-MNT created: 2006-03-20T12:12:14Z last-modified: 2006-03-20T12:12:14Z 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: 91.149.136.0/21 descr: DELEGATED CosmosTV origin: AS31143 mnt-by: BYGIS-MNT created: 2006-11-17T07:07:53Z last-modified: 2006-11-17T07:07:53Z 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: 93.125.104.0/22 descr: DELEGATED origin: AS31143 mnt-by: BYGIS-MNT created: 2016-02-19T14:23:19Z last-modified: 2016-02-19T14:23:19Z 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: 178.172.192.0/22 descr: DELEGATED origin: AS31143 mnt-by: BYGIS-MNT created: 2016-02-19T14:24:43Z last-modified: 2016-02-19T14:24:43Z 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: 178.172.237.0/24 descr: DELEGATED origin: AS31143 mnt-by: BYGIS-MNT created: 2012-04-11T08:41:42Z last-modified: 2012-04-11T08:41:42Z 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: 185.203.152.0/23 origin: AS31143 mnt-by: COSMOSTV-MNT created: 2018-11-27T09:30:35Z last-modified: 2018-11-27T09:30:35Z source: RIPE notify: inet_supp [at] cosmostv.com descr: OWN 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: 185.203.154.0/24 origin: AS31143 mnt-by: COSMOSTV-MNT created: 2018-11-27T09:31:30Z last-modified: 2018-11-27T09:31:30Z source: RIPE notify: inet_supp [at] cosmostv.com descr: OWN 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: 185.203.155.0/24 origin: AS31143 mnt-by: COSMOSTV-MNT created: 2018-11-27T09:32:08Z last-modified: 2018-11-27T09:32:08Z source: RIPE notify: inet_supp [at] cosmostv.com descr: OWN 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: 213.184.238.0/24 descr: DELEGATED origin: AS31143 notify: vlad [at] netland.by mnt-by: BYGIS-MNT created: 2004-03-09T13:16:50Z last-modified: 2005-11-09T10:03:28Z 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: 2a0a:eac0::/29 origin: AS31143 descr: OWN notify: inet_supp [at] cosmostv.com mnt-by: COSMOSTV-MNT created: 2017-05-19T22:06:42Z last-modified: 2017-05-19T22:06:42Z 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