These entries are queried from radb.net using whois, you can try my project getting these.
:AS35925 route: 67.98.18.160/28 descr: route update via web origin: AS35925 remarks: register notify: support [at] level3.com mnt-by: LEVEL3-MNT changed: support [at] level3.com 20080104 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source