These entries are queried from radb.net using whois, you can try my project getting these.
:AS11881 route: 209.203.100.0/24 origin: AS11881 descr: Prolexic Technologies, Inc. notify: hostmaster [at] prolexic.com mnt-by: MAINT-AS32787 changed: abenage [at] akamai.com 20210619 #11:19:48Z source: RADB last-modified: 2023-11-13T16:13:34Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source