These entries are queried from radb.net using whois, you can try my project getting these.
:AS22043 route: 199.181.136.0/23 descr: Proxy Entry for STERIS Corporation origin: AS22043 mnt-by: MAINT-CHTR-WD changed: alec.ritter [at] charter.com 20180102 #22:53:09Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.181.136.0/24 descr: Proxy Entry for STERIS Corporation origin: AS22043 mnt-by: MAINT-CHTR-WD changed: alec.ritter [at] charter.com 20180102 #22:51:58Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.181.137.0/24 descr: Proxy Entry for STERIS Corporation origin: AS22043 mnt-by: MAINT-CHTR-WD changed: alec.ritter [at] charter.com 20180102 #22:54:10Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.181.138.0/24 descr: Proxy Entry for STERIS Corporation origin: AS22043 mnt-by: MAINT-CHTR-WD changed: alec.ritter [at] charter.com 20180102 #22:54:48Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source