These entries are queried from radb.net using whois, you can try my project getting these.
:AS64231 route: 199.48.228.0/23 descr: AS64231-AGG1 origin: AS64231 mnt-by: MAINT-AS64231 changed: mdikkema [at] 24-7intouch.com 20160316 #15:14:33Z source: RADB last-modified: 2023-11-13T15:49:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.48.228.0/24 descr: AS64231-WPG1 origin: AS64231 mnt-by: MAINT-AS64231 changed: mdikkema [at] 24-7intouch.com 20160316 #15:16:26Z source: RADB last-modified: 2023-11-13T15:49:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.48.229.0/24 descr: AS64231-DEN1 origin: AS64231 mnt-by: MAINT-AS64231 changed: mdikkema [at] 24-7intouch.com 20160316 #15:16:56Z source: RADB last-modified: 2023-11-13T15:49:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source