These entries are queried from radb.net using whois, you can try my project getting these.
:AS12287 route: 199.19.48.0/24 descr: Afilias Canada, Corp. historic AMS1 origin: AS12287 mnt-by: MAINT-AFILIAS created: 2006-11-09T14:56:27Z last-modified: 2018-09-04T15:48:01Z source: RIPE-NONAUTH 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: 199.19.50.0/24 descr: Afilias PLC CTRL1 origin: AS12287 mnt-by: MAINT-AFILIAS created: 2015-06-29T09:23:04Z last-modified: 2018-09-04T18:12:08Z source: RIPE-NONAUTH 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: 2001:500:6::/48 descr: Afilias Canada, Corp. origin: AS12287 mnt-by: MAINT-AFILIAS created: 2009-04-16T15:35:02Z last-modified: 2018-09-04T19:40:49Z source: RIPE-NONAUTH 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: 2a01:8840:e::/48 descr: Afilias PLC CTRL1 origin: AS12287 mnt-by: MAINT-AFILIAS created: 2015-06-29T09:00:05Z last-modified: 2015-06-29T09:00:05Z 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