These entries are queried from radb.net using whois, you can try my project getting these.
:AS4777 route: 202.12.28.0/24 descr: APNIC Network country: JP origin: AS4777 mnt-by: MAINT-APNIC-IS-AP last-modified: 2018-11-20T03:20:12Z source: APNIC rpki-ov-state: valid route: 202.12.28.0/24 descr: APNIC in Tokyo, JAPAN origin: AS4777 mnt-by: MAINT-AS2500 changed: kato [at] wide.ad.jp 20011217 source: RADB last-modified: 2023-11-13T15:39:33Z rpki-ov-state: valid route: 203.119.0.0/24 origin: AS4777 descr: APNIC Singapore Network mnt-by: MAINT-APNIC-IS-AP last-modified: 2022-08-31T06:34:40Z country: SG source: APNIC rpki-ov-state: valid route6: 2001:dc::/35 descr: APNIC-NSPIXP2-AS Asia Pacific Network Information Centre origin: AS4777 mnt-by: MAINT-AS7545 changed: rony.jalova [at] tpg.com.au 20120123 #04:59:19Z source: RADB last-modified: 2023-11-13T15:41:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:dc0::/35 descr: APNIC-IPv6 JAPAN origin: AS4777 mnt-by: MAINT-APNIC-IS-AP last-modified: 2018-11-20T03:20:16Z source: APNIC rpki-ov-state: valid route6: 2001:dc0:c000::/35 origin: AS4777 descr: APNIC Singapore Network mnt-by: MAINT-APNIC-IS-AP last-modified: 2022-08-31T06:35:23Z country: SG source: APNIC rpki-ov-state: valid