These entries are queried from radb.net using whois, you can try my project getting these.
:AS23839 route: 203.79.0.0/20 descr: Temporary Obj for CNC-H origin: AS23839 notify: ops [at] ntt.net mnt-by: MAINT-NTTCOM-BB changed: naoki [at] ntt.net 20050826 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.100.96.0/19 origin: AS23839 descr: China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, mnt-by: MAINT-CNNIC-AP last-modified: 2020-08-10T03:02:00Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.234.64.0/20 origin: AS23839 descr: China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, mnt-by: MAINT-CNNIC-AP last-modified: 2020-08-10T03:02:42Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source