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

http://mirror.vcu.edu/pub/gnu_linux/centos/7.8.2003/isos/x86_64/
http://mirror.centos.iad1.serverforge.org/7.8.2003/isos/x86_64/
http://mirrors.advancedhosters.com/centos/7.8.2003/isos/x86_64/
http://mirror.cs.vt.edu/pub/CentOS/7.8.2003/isos/x86_64/
http://repos-va.psychz.net/centos/7.8.2003/isos/x86_64/
http://mirror.vtti.vt.edu/centos/7.8.2003/isos/x86_64/
http://centos5.zswap.net/7.8.2003/isos/x86_64/
http://us.mirror.nsec.pt/centos/7.8.2003/isos/x86_64/
http://repo1.ash.innoscale.net/centos/7.8.2003/isos/x86_64/
http://mirror.cogentco.com/pub/linux/centos/7.8.2003/isos/x86_64/
http://mirror.ash.fastserv.com/centos/7.8.2003/isos/x86_64/

http://mirror.den01.meanservers.net/centos/7.8.2003/isos/x86_64/
http://packages.oit.ncsu.edu/centos/7.8.2003/isos/x86_64/
http://mirror.centos.lax1.serverforge.org/7.8.2003/isos/x86_64/
http://centos.mirror.lstn.net/7.8.2003/isos/x86_64/
http://mirrors.oit.uci.edu/centos/7.8.2003/isos/x86_64/
http://repo1.sea.innoscale.net/centos/7.8.2003/isos/x86_64/
http://mirror.es.its.nyu.edu/centos/7.8.2003/isos/x86_64/
http://repos-tx.psychz.net/centos/7.8.2003/isos/x86_64/
http://mirror.jaleco.com/centos/7.8.2003/isos/x86_64/
http://mirror.mobap.edu/centos/7.8.2003/isos/x86_64/
http://ewr.edge.kernel.org/centos/7.8.2003/isos/x86_64/
http://repos.eggycrew.com/centos/7.8.2003/isos/x86_64/
http://mirror.us-midwest-1.nexcess.net/CentOS/7.8.2003/isos/x86_64/
http://ftp.osuosl.org/pub/centos/7.8.2003/isos/x86_64/
http://mirror.chpc.utah.edu/pub/centos/7.8.2003/isos/x86_64/
http://centos.mirrors.hoobly.com/7.8.2003/isos/x86_64/
http://mirror.xrepo.net/centos/7.8.2003/isos/x86_64/
http://mirrors.cmich.edu/centos/7.8.2003/isos/x86_64/
http://yum.tamu.edu/centos/7.8.2003/isos/x86_64/
+ others, see the full list of mirrors: https://www.centos.org/download/mirrors/

Mirrors verified Thu Sep 24 20:41:33 2020 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