These entries are queried from radb.net using whois, you can try my project getting these.
:AS17140 route: 208.68.244.0/24 origin: AS17140 descr: SP_CBRE mnt-by: MAINT-AS19905 changed: soc [at] neustar.biz 20210528 #18:46:09Z source: RADB last-modified: 2023-11-13T16:05:47Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.68.245.0/24 origin: AS17140 descr: SP_CBRE mnt-by: MAINT-AS19905 changed: soc [at] neustar.biz 20210528 #18:48:23Z source: RADB last-modified: 2023-11-13T16:05:47Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.68.246.0/24 origin: AS17140 descr: SP_CBRE mnt-by: MAINT-AS19905 changed: soc [at] neustar.biz 20221029 #20:33:20Z source: RADB last-modified: 2023-11-13T16:12:51Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.68.247.0/24 origin: AS17140 descr: SP_CBRE mnt-by: MAINT-AS19905 changed: soc [at] neustar.biz 20221029 #20:35:26Z source: RADB last-modified: 2023-11-13T16:12:51Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source