These entries are queried from radb.net using whois, you can try my project getting these.
:AS27387 route: 38.106.147.0/24 descr: Ostrow Reisin Berk & Abrams, Ltd. NBC Tower - Suite 2600 455 North Cityfront Plaza Drive Chicago, IL 60611 origin: AS27387 mnt-by: MAINT-AS27387 changed: TBeyersdorfer [at] orba.com 20080110 #22:06:39(UTC) source: RADB last-modified: 2023-11-13T15:39:54Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source