These entries are queried from radb.net using whois, you can try my project getting these.
:AS393257 route: 143.44.0.0/17 origin: AS393257 descr: Lawrence University mnt-by: MAINT-WISCNET changed: wopat [at] wiscnet.net 20210311 #18:04:50Z source: RADB last-modified: 2023-11-13T16:05:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source