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

http://reflector.westga.edu/repos/CentOS/6.10/isos/i386/
http://ftpmirror.your.org/pub/centos/6.10/isos/i386/
http://us.mirror.nsec.pt/centos/6.10/isos/i386/
http://la.mirrors.clouvider.net/CentOS/6.10/isos/i386/
http://mirrors.tummy.com/mirrors/CentOS/6.10/isos/i386/
http://mirror.us.oneandone.net/linux/distributions/centos/6.10/isos/i386/
http://centos.mirrors.tds.net/pub/linux/centos/6.10/isos/i386/
http://mirror.phx1.us.spryservers.net/centos/6.10/isos/i386/
http://ewr.edge.kernel.org/centos/6.10/isos/i386/
http://mirrors.unifiedlayer.com/centos/6.10/isos/i386/
http://ftp.osuosl.org/pub/centos/6.10/isos/i386/
http://centos.mirrors.hoobly.com/6.10/isos/i386/
http://mirrors.maine.edu/CentOS/6.10/isos/i386/
http://centos.den.host-engine.com/6.10/isos/i386/
http://mirror.vtti.vt.edu/centos/6.10/isos/i386/
http://repos.dfw.quadranet.com/centos/6.10/isos/i386/
http://repo.ialab.dsu.edu/centos/6.10/isos/i386/
http://mirrors.ocf.berkeley.edu/centos/6.10/isos/i386/
http://mirror.hostduplex.com/centos/6.10/isos/i386/
http://mirror.fileplanet.com/centos/6.10/isos/i386/
http://repo1.ash.innoscale.net/centos/6.10/isos/i386/
http://linux.cc.lehigh.edu/centos/6.10/isos/i386/
http://linux-mirrors.fnal.gov/linux/centos/6.10/isos/i386/
http://mirrors.radwebhosting.com/centos/6.10/isos/i386/
http://mirror.ash.fastserv.com/centos/6.10/isos/i386/
http://mirrors.rit.edu/centos/6.10/isos/i386/
http://mirror.trouble-free.net/centos/6.10/isos/i386/
http://mirror.cogentco.com/pub/linux/centos/6.10/isos/i386/
http://mirror.us-midwest-1.nexcess.net/CentOS/6.10/isos/i386/
http://mirror.netdepot.com/centos/6.10/isos/i386/
+ others, see the full list of mirrors: https://www.centos.org/download/mirrors/

Mirrors verified Wed Nov 11 16:15:29 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