These entries are queried from radb.net using whois, you can try my project getting these.
:AS394723 route: 168.8.208.0/21 descr: proxy entry for downstream customer origin: AS394723 mnt-by: MAINT-AS55091 changed: wmclendon [at] layer3com.com 20170818 #00:15:10Z source: RADB last-modified: 2023-11-13T15:51:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.8.208.0/24 origin: AS394723 descr: proxy entry for downstream customer mnt-by: MAINT-AS55091 changed: wmclendon [at] layer3com.com 20200112 #14:15:33Z source: RADB last-modified: 2023-11-13T15:59:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.8.209.0/24 origin: AS394723 descr: proxy entry for downstream customer mnt-by: MAINT-AS55091 changed: wmclendon [at] layer3com.com 20200112 #14:16:11Z source: RADB last-modified: 2023-11-13T15:59:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.8.210.0/24 origin: AS394723 descr: proxy entry for downstream customer mnt-by: MAINT-AS55091 changed: wmclendon [at] layer3com.com 20200112 #14:16:49Z source: RADB last-modified: 2023-11-13T15:59:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.8.211.0/24 origin: AS394723 descr: proxy entry for downstream customer mnt-by: MAINT-AS55091 changed: wmclendon [at] layer3com.com 20200112 #14:17:31Z source: RADB last-modified: 2023-11-13T15:59:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.8.212.0/24 origin: AS394723 descr: proxy entry for downstream customer mnt-by: MAINT-AS55091 changed: wmclendon [at] layer3com.com 20200112 #14:18:13Z source: RADB last-modified: 2023-11-13T15:59:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.8.213.0/24 origin: AS394723 descr: proxy entry for downstream customer mnt-by: MAINT-AS55091 changed: wmclendon [at] layer3com.com 20200112 #14:18:41Z source: RADB last-modified: 2023-11-13T15:59:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.8.214.0/24 origin: AS394723 descr: proxy entry for downstream customer mnt-by: MAINT-AS55091 changed: wmclendon [at] layer3com.com 20200107 #21:44:15Z source: RADB last-modified: 2023-11-13T15:59:36Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.8.215.0/24 origin: AS394723 descr: proxy entry for downstream customer mnt-by: MAINT-AS55091 changed: wmclendon [at] layer3com.com 20200112 #14:19:25Z source: RADB last-modified: 2023-11-13T15:59:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source