These entries are queried from radb.net using whois, you can try my project getting these.
:AS35963 route: 8.37.35.0/24 descr: CHTR-GREENVILLE-SPARTANBURG AIRPORT DISTRICT-Carolinas origin: AS35963 admin-c: IPADDREG tech-c: IPADDREG notify: publicipaddressing [at] charter.com mnt-by: MAINT-CHTR-WD changed: publicipaddressing [at] charter.com 20210603 #20:32:42Z source: RADB last-modified: 2023-11-13T16:11:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source