These entries are queried from radb.net using whois, you can try my project getting these.
:AS2496 route: 129.237.0.0/16 descr: University of Kansas Networking and Telecomunication Services Lawrence KS 66045 US origin: AS2496 admin-c: NETAD8-ARIN tech-c: NETAD8-ARIN remarks: Maintained by KanREN notify: hostmaster [at] kanren.net mnt-by: MAINT-AS2495 changed: nordlund [at] kanren.net 20021025 changed: hostmaster [at] kanren.net 20040304 #03:44:05(UTC) source: RADB last-modified: 2023-11-13T15:39:34Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:49d0:8400::/38 origin: AS2496 descr: University of Kansas Networking and Telecomunication Services Lawrence KS 66045 remarks: University of Kansas Networking and Telecomunication Services Lawrence KS 66045 admin-c: KANRE-ARIN tech-c: NETAD8-ARIN mnt-by: MNT-KREN created: 2022-08-25T19:34:30Z last-modified: 2023-08-07T16:10:35Z source: ARIN rpki-ov-state: valid