These entries are queried from radb.net using whois, you can try my project getting these.
:AS30866 route: 147.234.0.0/16 descr: AS30866 proxy-registered route by Cogent origin: AS30866 remarks: Proxy-registered route object remarks: for Cogent customer notify: neteng [at] cogentco.com mnt-by: MAINT-AS174 changed: neteng [at] cogentco.com 20040630 source: RADB last-modified: 2023-11-13T15:39:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 147.234.1.0/24 origin: AS30866 mnt-by: ECI-MNT created: 2022-06-26T12:32:05Z last-modified: 2022-06-26T12:32:05Z 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 route: 147.234.56.0/21 origin: AS30866 mnt-by: ECI-MNT created: 2019-06-23T11:07:23Z last-modified: 2019-06-23T11:07:23Z 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: 147.234.128.0/17 descr: ECI origin: AS30866 mnt-by: ECI-MNT created: 2009-11-25T11:56:43Z last-modified: 2019-07-16T08:08:15Z 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 route: 147.234.132.0/22 origin: AS30866 mnt-by: ECI-MNT created: 2022-06-26T12:50:07Z last-modified: 2022-06-26T12:50:07Z 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: 147.234.216.0/24 origin: AS30866 mnt-by: ECI-MNT created: 2022-06-26T12:50:32Z last-modified: 2022-06-26T12:50:32Z 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: 147.234.238.0/24 origin: AS30866 mnt-by: ECI-MNT created: 2022-06-26T12:51:10Z last-modified: 2022-06-26T12:51:10Z 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: 147.234.242.0/24 origin: AS30866 mnt-by: ECI-MNT created: 2022-06-26T12:51:36Z last-modified: 2022-06-26T12:51:36Z 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