These entries are queried from radb.net using whois, you can try my project getting these.
:AS33820 route: 145.36.0.0/16 origin: AS33820 mnt-by: RETS-RIPE-MNT created: 2023-09-08T10:13:50Z last-modified: 2023-09-08T10:13:50Z 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: 145.36.201.0/24 origin: AS33820 descr: Elsevier mnt-by: MAINT-AS15695 changed: renato.tabing [at] expereo.com 20210426 #09:48:39Z source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 145.36.203.0/24 origin: AS33820 descr: Customer Proxy Route admin-c: UNITAS-SOC tech-c: UNITAS-SOC mnt-by: MAINT-AS1828 changed: avi.nannival [at] unitasglobal.com 20220526 #21:46:27Z source: RADB last-modified: 2023-11-13T16:11:22Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 145.36.205.0/24 origin: AS33820 descr: Elsevier mnt-by: MAINT-AS15695 changed: renato.tabing [at] expereo.com 20210426 #09:50:52Z source: RADB last-modified: 2023-11-13T16:05:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source