http://repos.mia.quadranet.com/centos/6.9/os/i386/
http://bay.uchicago.edu/centos/6.9/os/i386/
http://centos.vwtonline.net/centos/6.9/os/i386/
http://mirror.cisp.com/CentOS/6.9/os/i386/
http://repo.us.bigstepcloud.com/centos/6.9/os/i386/
http://mirrors.seas.harvard.edu/centos/6.9/os/i386/
http://repo1.sea.innoscale.net/centos/6.9/os/i386/
ftp://ftp.ussg.iu.edu/linux/centos/6.9/os/i386/
http://yum.tamu.edu/centos/6.9/os/i386/
http://linux.mirrors.es.net/centos/6.9/os/i386/