These entries are queried from radb.net using whois, you can try my project getting these.
:AS-15808 as-set: AS-15808 admin-c: NPS2007-AFRINIC tech-c: NPS2007-AFRINIC descr: DIMENSION DATA KE mnt-by: ACCESSKENYA-MNT changed: *** [at] dimensiondata.com 20240304 source: AFRINIC members: AS15808 members: AS12556 members: AS-12556 members: AS328089 members: AS327727 members: AS327766 members: AS327793 members: AS328087 members: AS328132 members: AS328201 members: AS328482 members: AS328637 members: AS328637 members: AS328724 members: AS328978 members: AS329239 members: AS36904 members: AS36975 members: AS37109 members: AS37166 members: AS37319 members: AS13150 members: AS329002 members: AS37535 members: AS329341