These entries are queried from radb.net using whois, you can try my project getting these.
:AS15315 route: 216.49.192.0/22 descr: IVANET-NY2 origin: AS15315 notify: netarch [at] ibasis.net mnt-by: IVANET-MAINT changed: solos [at] ibasis.net 20030724 changed: santoshrao [at] ibasis.net 20060510 #14:54:24(UTC) source: RADB last-modified: 2023-11-13T15:39:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.49.196.0/24 descr: IVANET-NY2 origin: AS15315 mnt-by: IVANET-MAINT changed: santoshrao [at] ibasis.net 20060510 #15:12:52(UTC) source: RADB last-modified: 2023-11-13T15:39:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source