These entries are queried from radb.net using whois, you can try my project getting these.
:AS55635 route6: 2401:500::/36 descr: route object for 2401:0500::/36 origin: AS55635 remarks: Network Issues : ******** remarks: Spam and Security: ******** mnt-lower: MAINT-TH-SERVENET mnt-routes: MAINT-TH-SERVENET mnt-by: MAINT-TH-SERVENET last-modified: 2011-06-08T12:10:42Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source