These entries are queried from radb.net using whois, you can try my project getting these.
:AS263836 route6: 2803:5640::/32 descr: This route object is for IFX Networks customer route which is being exported under this origin AS 263836 origin: AS263836 mnt-by: MAINT-AS18747 changed: noc [at] ifxcorp.com 20151119 #13:44:04Z source: RADB last-modified: 2023-11-13T16:18:58Z rpki-ov-state: valid