These entries are queried from radb.net using whois, you can try my project getting these.
:AS18640 route: 64.208.8.0/24 descr: ALCHEMY-IDEALAB origin: AS18640 notify: neteng [at] alchemy.net mnt-by: ALCHEMY1-MNT changed: rortiz [at] alchemy.net 20090505 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 64.211.62.0/24 descr: ALCHEMY-IDEALAB origin: AS18640 notify: neteng [at] alchemy.net mnt-by: ALCHEMY1-MNT changed: rortiz [at] alchemy.net 20090505 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 64.211.63.0/24 descr: ALCHEMY-IDEALAB origin: AS18640 notify: neteng [at] alchemy.net mnt-by: ALCHEMY1-MNT changed: rortiz [at] alchemy.net 20090505 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.0.0/24 descr: PNAP-LAX idealab routes origin: AS18640 mnt-by: MAINT-AS1828 changed: rrudd [at] internap.com 20070317 source: RADB last-modified: 2023-11-13T16:13:57Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.0.0/24 descr: ALCHEMY-IDEALAB origin: AS18640 notify: neteng [at] alchemy.net mnt-by: ALCHEMY1-MNT changed: rortiz [at] alchemy.net 20090505 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.1.0/24 descr: ALCHEMY-IDEALAB origin: AS18640 notify: neteng [at] alchemy.net mnt-by: ALCHEMY1-MNT changed: rortiz [at] alchemy.net 20090504 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.1.0/24 descr: PNAP-LAX idealab routes origin: AS18640 mnt-by: MAINT-AS1828 changed: rrudd [at] internap.com 20070317 source: RADB last-modified: 2023-11-13T16:13:57Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.2.0/23 descr: PNAP-LAX idealab routes origin: AS18640 mnt-by: MAINT-AS1828 changed: rrudd [at] internap.com 20070317 source: RADB last-modified: 2023-11-13T16:13:57Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.2.0/23 descr: ALCHEMY-IDEALAB origin: AS18640 notify: neteng [at] alchemy.net mnt-by: ALCHEMY1-MNT changed: rortiz [at] alchemy.net 20090430 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source