These entries are queried from radb.net using whois, you can try my project getting these.
:AS51973 route: 46.149.32.0/20 descr: route object origin: AS51973 mnt-by: KOLT-MNT created: 2010-12-14T09:44:57Z last-modified: 2010-12-14T09:44:57Z 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: not_found # No ROAs found, or RPKI validation not enabled for source route: 46.149.32.0/21 origin: AS51973 mnt-by: KOLT-MNT created: 2019-07-29T12:50:29Z last-modified: 2019-07-29T12:50:29Z 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: 46.149.40.0/21 origin: AS51973 mnt-by: KOLT-MNT created: 2019-07-29T12:52:59Z last-modified: 2019-07-29T12:52:59Z 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: 81.163.240.0/20 descr: route object origin: AS51973 mnt-by: KOLT-MNT mnt-by: CHELNY-MNT created: 2011-10-23T20:31:51Z last-modified: 2016-12-20T14:52:54Z 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: not_found # No ROAs found, or RPKI validation not enabled for source route: 81.163.240.0/21 origin: AS51973 mnt-by: KOLT-MNT created: 2019-07-29T13:24:04Z last-modified: 2019-07-29T13:24:04Z 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: 81.163.248.0/21 origin: AS51973 mnt-by: KOLT-MNT created: 2019-07-29T13:24:52Z last-modified: 2019-07-29T13:24:52Z 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: 2001:67c:2954::/48 origin: AS51973 mnt-by: KOLT-MNT created: 2021-02-24T08:12:53Z last-modified: 2021-02-24T08:12:53Z 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