These entries are queried from radb.net using whois, you can try my project getting these.
:AS16501 route: 199.96.216.0/21 descr: I2C route object origin: AS16501 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20170113 #12:08:59Z source: RADB last-modified: 2023-11-13T15:50:34Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.96.216.0/24 descr: PNAP-SJE i2c origin: AS16501 mnt-by: MAINT-AS1828 changed: djaffers [at] internap.com 20110524 source: RADB last-modified: 2023-11-13T16:14:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.96.217.0/24 descr: PNAP-SJE i2c origin: AS16501 mnt-by: MAINT-AS1828 changed: djaffers [at] internap.com 20110524 source: RADB last-modified: 2023-11-13T16:14:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.96.218.0/24 descr: PNAP-SJE i2c origin: AS16501 mnt-by: MAINT-AS1828 changed: djaffers [at] internap.com 20110524 source: RADB last-modified: 2023-11-13T16:14:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.96.219.0/24 descr: I2C route object origin: AS16501 admin-c: netops-defense tech-c: netops-defense notify: netops [at] defense.net mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20161211 #05:02:36Z source: RADB last-modified: 2023-11-13T15:50:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.96.220.0/24 descr: I2C route object origin: AS16501 admin-c: netops-defense tech-c: netops-defense notify: netops [at] defense.net mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20161211 #05:03:32Z source: RADB last-modified: 2023-11-13T15:50:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.96.221.0/24 descr: I2C route object origin: AS16501 admin-c: netops-defense tech-c: netops-defense notify: netops [at] defense.net mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20161211 #05:04:22Z source: RADB last-modified: 2023-11-13T15:50:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.96.222.0/24 descr: I2C route object origin: AS16501 notify: netguard [at] gtt.net mnt-by: MAINT-AS3257 changed: netguard [at] gtt.net 20210106 source: RADB last-modified: 2023-11-13T16:03:22Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.96.223.0/24 descr: I2C route object origin: AS16501 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20161102 #09:13:40Z source: RADB last-modified: 2023-11-13T15:49:55Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source