These entries are queried from radb.net using whois, you can try my project getting these.
:AS139551 route: 103.147.88.0/23 descr: Dbl Network Private Limited origin: AS139551 mnt-by: MAINT-IN-DBLINT mnt-routes: MAINT-IN-DBLINT last-modified: 2020-01-14T10:21:02Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.147.88.0/24 origin: AS139551 descr: DBL Network Private Limited mnt-by: MAINT-AS33480 changed: nikhil [at] webwerks.com 20210223 #16:04:17Z source: RADB last-modified: 2023-11-13T16:18:48Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source