These entries are queried from radb.net using whois, you can try my project getting these.
:AS40176 route: 208.76.48.0/22 descr: 208.76.48.0/22 origin: AS40176 admin-c: MAINT-AS16724 tech-c: MAINT-AS16724 mnt-by: MAINT-AS16724 changed: jashton [at] esnet.com 20100802 #19:55:54Z source: RADB last-modified: 2023-12-11T16:00:06Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.48.0/24 descr: 208.76.48.0/24 origin: AS40176 mnt-by: MAINT-AS16724 changed: jashton [at] esnet.com 20100803 #17:41:06Z source: RADB last-modified: 2023-12-11T16:00:06Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.49.0/24 descr: 208.76.49.0/24 origin: AS40176 mnt-by: MAINT-AS16724 changed: jashton [at] esnet.com 20100803 #17:41:26Z source: RADB last-modified: 2023-12-11T16:00:06Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.50.0/24 descr: 208.76.50.0/24 origin: AS40176 mnt-by: MAINT-AS16724 changed: jashton [at] esnet.com 20100803 #17:41:47Z source: RADB last-modified: 2023-12-11T16:00:06Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.51.0/24 descr: 208.76.51.0/24 origin: AS40176 mnt-by: MAINT-AS16724 changed: jashton [at] esnet.com 20100803 #17:40:49Z source: RADB last-modified: 2023-12-11T16:00:06Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source