These entries are queried from radb.net using whois, you can try my project getting these.
:AS35996 route6: 2607:1880:1600::/40 origin: AS35996 descr: CentralColo SV1 DC, LLC notify: neteng [at] elementcritical.com mnt-by: CENTRALCOLO changed: antuyo [at] elementcritical.com 20240207 # 1729Z source: RADB last-modified: 2024-02-07T17:29:48Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source