These entries are queried from radb.net using whois, you can try my project getting these.
:AS18863 route: 63.96.44.0/24 descr: BGP update origin: AS18863 mnt-by: PUREPACKET-MNT changed: rrmntnr [at] purepacket.com 20010321 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 64.154.48.0/21 descr: Creating Route Object For PurePacket Network origin: AS18863 remarks: Creating Route Object For PurePacket Network notify: hgatei [at] purepacket.com mnt-by: PUREPACKET-MNT changed: hgatei [at] purepacket.com 20000915 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.7.160.0/21 descr: Switch Communications Customer Route origin: AS18863 remarks: Route for Broadriver Communications remarks: 199.7.160.0/21-24 mnt-by: SWITCHCOM-MNT changed: netops-eng [at] switchlv.com 20150107 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.8.177.0/24 descr: BGP update origin: AS18863 mnt-by: PUREPACKET-MNT changed: rrmnt [at] purepacket.com 20010608 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.52.128.0/18 descr: BGP update origin: AS18863 mnt-by: PUREPACKET-MNT changed: rrmntnr [at] purepacket.com 20010212 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.52.128.0/23 descr: BGP update origin: AS18863 mnt-by: PUREPACKET-MNT changed: rrmntnr [at] purepacket.com 20010321 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.52.130.0/23 descr: BGP update origin: AS18863 mnt-by: PUREPACKET-MNT changed: rrmntnr [at] purepacket.com 20010321 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.126.32.0/20 descr: BGP update origin: AS18863 mnt-by: PUREPACKET-MNT changed: robert.steinauer [at] level3.com 20001226 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2607:fd88:2000::/48 descr: Switch Communications Customer Route origin: AS18863 remarks: Route for Broadriver Communications remarks: 2607:fd88:2000::/48 notify: netops-eng [at] supernap.com mnt-by: SWITCHCOM-MNT changed: netops-eng [at] supernap.com 20150112 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2607:fd88:2000::/48 descr: Switch Communications Customer Route origin: AS18863 member-of: RS-AS23005 mnt-by: MAINT-SWITCH changed: netops [at] switch.com 20180102 source: RADB last-modified: 2023-11-13T15:52:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source