These entries are queried from radb.net using whois, you can try my project getting these.
:AS54923 route: 198.251.96.0/20 descr: Network Communications origin: AS54923 mnt-by: MAINT-AS13760 changed: gwooden [at] slfiber.com 20170810 #18:20:52Z source: RADB last-modified: 2023-11-13T15:51:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source