These entries are queried from radb.net using whois, you can try my project getting these.
:AS30515 route: 63.99.74.0/23 descr: US Pharmacopeia - AS30515 origin: AS30515 mnt-by: MAINT-AS7784 changed: noc [at] atlantech.net 20031029 #16:58:22(UTC) source: RADB last-modified: 2023-11-13T15:39:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.99.74.0/24 descr: US Pharmacopeia - AS30515 origin: AS30515 mnt-by: MAINT-AS7784 changed: noc [at] atlantech.net 20060510 source: RADB last-modified: 2023-11-13T15:39:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.99.75.0/24 descr: US Pharmacopeia - AS30515 origin: AS30515 mnt-by: MAINT-AS7784 changed: noc [at] atlantech.net 20060510 source: RADB last-modified: 2023-11-13T15:39:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source