These entries are queried from radb.net using whois, you can try my project getting these.
:AS54257 route: 155.42.0.0/16 descr: Vermont State Colleges origin: AS54257 remarks: Multihomed customer mnt-by: MAINT-SOVER-NOC changed: noc [at] sover.net 20141121 #19:17:02Z source: RADB last-modified: 2023-11-13T16:00:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source