These entries are queried from radb.net using whois, you can try my project getting these.
:AS51166 route: 91.216.153.0/24 descr: Nexusguard (Customer Route) origin: AS51166 mnt-by: MAINT-AS45474 changed: peering [at] nexusguard.com 20170104 #02:44:24Z source: RADB last-modified: 2023-11-13T15:50:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 91.216.153.0/24 descr: CMI IP Transit origin: AS51166 admin-c: MAINT-CMI-INT-HK tech-c: MAINT-CMI-INT-HK mnt-by: MAINT-CMI-INT-HK changed: qas_support [at] cmi.chinamobile.com 20180108 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 91.216.153.0/24 descr: Ixaris Technologies Ltd MT Subnet origin: AS51166 mnt-by: IXS-MNT created: 2010-06-15T10:48:13Z last-modified: 2016-11-30T16:20:33Z 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