These entries are queried from radb.net using whois, you can try my project getting these.
:AS131644 route6: 2404:d740::/32 descr: ZENDONGINFO-NET - ipv6 network origin: AS131644 mnt-by: MAINT-AS131644 changed: cywang886 [at] gmail.com 20190517 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2404:d740:200::/48 descr: Zhendong Information - IPv6 RANGE origin: AS131644 mnt-by: MAINT-AS131644 changed: cywang886 [at] gmail.com 20190601 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2404:d740:201::/48 descr: Zhendong Information - IPv6 RANGE origin: AS131644 mnt-by: MAINT-AS131644 changed: cywang886 [at] gmail.com 20190601 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2404:d740:202::/48 descr: Zhendong Information - IPv6 RANGE origin: AS131644 mnt-by: MAINT-AS131644 changed: cywang886 [at] gmail.com 20190601 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source