These entries are queried from radb.net using whois, you can try my project getting these.
:AS397990 route: 23.144.112.0/24 descr: Williamslabs LLC IPv4 origin: AS397990 mnt-by: MAINT-AS397990 changed: altdb [at] williamslabs.com 20191019 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 44.31.141.0/24 origin: AS397990 descr: KI6GST admin-c: SMITH5996-ARIN tech-c: SMITH5996-ARIN notify: hostmaster [at] ardc.net mnt-by: MAINT-ARDC changed: chris [at] ardc.net 20230508 #10:26:39Z source: RADB last-modified: 2023-11-13T16:17:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:78:a000::/48 descr: Williamslabs LLC IPv6 origin: AS397990 mnt-by: MAINT-AS397990 changed: altdb [at] williamslabs.com 20191018 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source