These entries are queried from radb.net using whois, you can try my project getting these.
:AS9593 route: 138.101.0.0/16 descr: Nihon Keizai Shimbun,Inc. NIKKEI origin: AS9593 notify: akazawa [at] nikkei.co.jp mnt-by: MAINT-AS9593 changed: akazawa [at] nikkei.co.jp 20000118 source: RADB last-modified: 2023-11-13T15:39:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source