These entries are queried from radb.net using whois, you can try my project getting these.
:AS-BROADBASED-TRANSIT as-set: AS-BROADBASED-TRANSIT admin-c: NOC9-AFRINIC tech-c: JI4-AFRINIC descr: AS-BROADBASED-TRANSIT mnt-by: ibroadbased-mnt changed: *** [at] broadbased.net 20211125 source: AFRINIC members: AS-37280