These entries are queried from radb.net using whois, you can try my project getting these.
:AS22609 route: 199.181.148.0/24 descr: For downstream customer origin: AS22609 mnt-by: MAINT-AS26554 changed: noc [at] ussignalcom.com 20120910 #13:55:00Z source: RADB last-modified: 2023-11-13T15:43:22Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.131.50.0/24 descr: Yahoo! Inc. - Corp. Sites Aggregate origin: AS22609 mnt-by: MAINT-YAHOO changed: spencere [at] yahoo-inc.com 20090504 source: RADB last-modified: 2023-11-13T15:39:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source