These entries are queried from radb.net using whois, you can try my project getting these.
:AS2149 route6: 2001:500:2::/48 descr: Cogent Communications IPv6 Micro Allocation origin: AS2149 remarks: IPv6 MicroAllocation for C-ROOT mnt-by: MAINT-AS174 changed: neteng [at] cogentco.com 20140717 #13:27:05Z source: RADB last-modified: 2023-11-13T15:46:36Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source