These entries are queried from radb.net using whois, you can try my project getting these.
:AS55312 route: 202.52.39.0/24 descr: HOANGLONG Company VIetNam AS55312 origin: AS55312 notify: noc [at] vnn.vn notify: bachhm [at] vdc.com.vn mnt-by: MAINT-VDC changed: bachhm [at] vdc.com.vn 20100819 #10:00:00 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.52.39.0/24 descr: HOAN VU JOC origin: AS55312 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20100630 #08:10:50Z source: RADB last-modified: 2023-11-13T15:40:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source