These entries are queried from radb.net using whois, you can try my project getting these.
:AS133912 route: 103.47.232.0/24 origin: AS133912 descr: MediaCorp Pte Ltd Mediacorp Campus 1 Stars Avenue mnt-by: MAINT-MEDIACORPPTELTD-SG last-modified: 2020-03-12T05:46:28Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source