These entries are queried from radb.net using whois, you can try my project getting these.
:AS32831 route: 63.251.236.0/23 descr: Roswell Park Cancer Institute origin: AS32831 mnt-by: MAINT-AS27506 changed: philippe.robillard [at] crowncastle.com 20240228 source: RADB last-modified: 2024-02-28T15:40:49Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.251.236.0/24 descr: Roswell Park Cancer Institute origin: AS32831 mnt-by: MAINT-AS27506 changed: philippe.robillard [at] crowncastle.com 20240228 source: RADB last-modified: 2024-02-28T15:40:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.251.237.0/24 descr: Roswell Park Cancer Institute origin: AS32831 mnt-by: MAINT-AS27506 changed: philippe.robillard [at] crowncastle.com 20240228 source: RADB last-modified: 2024-02-28T15:40:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 67.99.174.0/23 descr: Roswell Park Cancer Institute origin: AS32831 mnt-by: MAINT-AS27506 changed: rhinst [at] lightower.com 20160902 #18:57:08Z source: RADB last-modified: 2023-11-13T15:49:51Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.5.51.0/24 descr: Roswell Park Cancer Institute origin: AS32831 mnt-by: MAINT-AS27506 changed: rhinst [at] lightower.com 20160902 #18:57:08Z source: RADB last-modified: 2023-11-13T15:49:51Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source