These entries are queried from radb.net using whois, you can try my project getting these.
:AS19620 route: 104.193.192.0/22 descr: Customer Proxy Registration origin: AS19620 mnt-by: MAINT-AS40065 changed: zchen [at] cnservers.com 20141026 #18:19:02Z source: RADB last-modified: 2023-11-13T15:46:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 104.232.219.0/24 descr: Customer proxy registration origin: AS19620 mnt-by: MAINT-AS40065 changed: zchen [at] cnservers.com 20141210 #07:21:11Z source: RADB last-modified: 2023-11-13T15:47:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 142.206.0.0/16 descr: Statistics Canada via GENet origin: AS19620 mnt-by: MAINT-AS2652 changed: todd.ross [at] pwgsc.gc.ca 20021008 source: Bell rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 172.81.144.0/21 descr: cust proxy reg origin: AS19620 mnt-by: MAINT-AS40065 changed: zchen [at] cnservers.com 20200610 source: RADB last-modified: 2023-11-13T16:00:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 172.81.144.0/22 descr: Customer proxy registration origin: AS19620 mnt-by: MAINT-AS40065 changed: zchen [at] cnservers.com 20150715 #15:32:27Z source: RADB last-modified: 2023-11-13T15:47:50Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source