These entries are queried from radb.net using whois, you can try my project getting these.
:AS46621 route: 216.162.16.0/20 descr: Proxy Registration for Broome-Tioga BOCES origin: AS46621 admin-c: Jeff Harrington tech-c: NYSERNet NOC remarks: This is a proxy registration by NYSERNet on behalf of one of our member campuses. For changes or removal, contact noc [at] nysernet.org notify: noc [at] nysernet.org notify: jthomps2 [at] btboces.org mnt-by: MAINT-AS3754 changed: jharring [at] nysernet.org 20190807 #15:22:59Z source: RADB last-modified: 2023-11-13T15:57:00Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source