These entries are queried from radb.net using whois, you can try my project getting these.
:AS203335 route: 190.0.228.0/24 origin: AS203335 descr: Akamai Technologies, Inc. mnt-by: MAINT-AS32787 changed: cromero [at] akamai.com 20210910 #01:54:35Z source: RADB last-modified: 2023-11-13T16:13:34Z rpki-ov-state: valid