In order to conserve the limited bandwidth available, ISO images are not downloadable from mirror.centos.org

http://us.mirror.nsec.pt/centos/8.4.2105/isos/ppc64le/
http://mirror.ash.fastserv.com/centos/8.4.2105/isos/ppc64le/
http://repos-va.psychz.net/centos/8.4.2105/isos/ppc64le/
http://mirrors.advancedhosters.com/centos/8.4.2105/isos/ppc64le/
http://mirror.cogentco.com/pub/linux/centos/8.4.2105/isos/ppc64le/
http://mirror.cs.vt.edu/pub/CentOS/8.4.2105/isos/ppc64le/
http://mirror.vcu.edu/pub/gnu_linux/centos/8.4.2105/isos/ppc64le/
http://mirror.centos.iad1.serverforge.org/8.4.2105/isos/ppc64le/
http://mirror.vtti.vt.edu/centos/8.4.2105/isos/ppc64le/

http://mirror.facebook.net/centos/8.4.2105/isos/ppc64le/
http://mirror.us-midwest-1.nexcess.net/CentOS/8.4.2105/isos/ppc64le/
http://mirror.team-cymru.com/CentOS/8.4.2105/isos/ppc64le/
http://repos.lax.quadranet.com/centos/8.4.2105/isos/ppc64le/
http://mirror.fileplanet.com/centos/8.4.2105/isos/ppc64le/
http://repos.lax.layerhost.com/centos/8.4.2105/isos/ppc64le/
http://centos.mirror.shastacoe.net/centos/8.4.2105/isos/ppc64le/
http://ftp.ussg.iu.edu/linux/centos/8.4.2105/isos/ppc64le/
http://centos.host-engine.com/8.4.2105/isos/ppc64le/
http://mirror.umd.edu/centos/8.4.2105/isos/ppc64le/
http://linux.cc.lehigh.edu/centos/8.4.2105/isos/ppc64le/
http://mirror.netdepot.com/centos/8.4.2105/isos/ppc64le/
http://mirror.nodesdirect.com/centos/8.4.2105/isos/ppc64le/
http://mirrors.xtom.com/centos/8.4.2105/isos/ppc64le/
http://atl.mirrors.clouvider.net/CentOS/8.4.2105/isos/ppc64le/
http://mirror.mojohost.com/centos/8.4.2105/isos/ppc64le/
http://mirror.atl.genesisadaptive.com/centos/8.4.2105/isos/ppc64le/
http://mirrors.cmich.edu/centos/8.4.2105/isos/ppc64le/
http://centos.mirror.constant.com/8.4.2105/isos/ppc64le/
http://mirror.grid.uchicago.edu/pub/linux/centos/8.4.2105/isos/ppc64le/
http://mirrors.unifiedlayer.com/centos/8.4.2105/isos/ppc64le/
+ others, see the full list of mirrors: https://www.centos.org/download/mirrors/

Mirrors verified Sun Jul 25 23:06:07 2021 UTC

You can also download the ISO images using bittorrent, a peer-to-peer file sharing protocol. The .torrent files can be found from CentOS mirrors. Various bittorrent clients are available, including (in no particular order of preference): utorrent, vuze (Azureus), BitTorrent, Deluge, ctorrent, ktorrent, rtorrent and transmission. Packaged copies of various torrent clients for CentOS can be found in the repositories listed in the following wiki article: https://wiki.centos.org/AdditionalResources/Repositories