These entries are queried from radb.net using whois, you can try my project getting these.
:AS132356 route: 103.14.185.0/24 origin: AS132356 descr: Changi Airport Group (Singapore) Pte Ltd 60 Airport Boulevard #046-037 Changi Airport Terminal 2 mnt-by: MAINT-CAG-IT-SG last-modified: 2020-06-15T12:28:02Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.137.210.0/24 origin: AS132356 descr: Changi Airport Group (Singapore) Pte Ltd 60 Airport Boulevard #046-037 Changi Airport Terminal 2 mnt-by: MAINT-CAG-IT-SG last-modified: 2020-06-15T12:28:02Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source