These entries are queried from radb.net using whois, you can try my project getting these.
:AS26030 route: 157.229.76.0/24 descr: RR-RC-UNITED HEALTH GROUP/REMOTE SITES-Northeast origin: AS26030 admin-c: IPADD1-ARIN tech-c: IPADD1-ARIN notify: PublicIPAdressing [at] charter.com mnt-by: MAINT-RR changed: PublicIPAdressing [at] charter.com source: RADB last-modified: 2024-02-27T16:22:04Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.78.76.0/22 descr: RR-RC-GHS-Data-Management-Portland origin: AS26030 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:14:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source