Twin directories of centos:

[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors/centos/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/Linux/centos/
[DIR]  ftp://ftp.nakedape.cc/pub/centos/
[DIR]  ftp://ftp.wicks.co.nz/pub/linux/dist/centos/
[DIR]  ftp://ftp.rdc.cl/pub/Unix/centos/
[DIR]  ftp://ftp.fagskolen.gjovik.no/pub/centos/
[DIR]  ftp://ftp.wustl.edu/pub/linux/distributions/centos/
[DIR]  ftp://ftp.wustl.edu/pub/linux/distributions/centos-beta/centos/
[DIR]  ftp://ftp.port80.se/centos/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/linux/centos/
[DIR]  ftp://ftp.cs.uni-bonn.de/pub/mirror/centos/
[DIR]  ftp://ftp.uni-koeln.de/mirrors/centos/
[DIR]  ftp://ftp.ednet.ns.ca/centos/
[DIR]  ftp://ftp.swin.edu.au/centos/
[DIR]  ftp://ftp.ut.ee/pub/centos/
[DIR]  ftp://ftp.cs.stanford.edu/pub/mirrors/centos/
[DIR]  ftp://ftp.cs.stanford.edu/pub/rpms/centos/
[DIR]  ftp://ftp.highway1.com.au/pub/linux/centos/
[DIR]  ftp://ftp.linux.org.uk/pub/linux/arm/centos/
[DIR]  ftp://ftp.linux.org.uk/pub/distributions/centos/
[DIR]  ftp://ftp.ovh.net/made-in-ovh/centos/
[DIR]  ftp://ftp.lanprojekt.cz/pub/linux/centos/
[DIR]  ftp://ftp.dc.aleron.net/pub/linux/centos/
[DIR]  ftp://ftp.linuxforum.hu/linux/centos/
[DIR]  ftp://ftp.crc.dk/pub/mirrors/centos/
[DIR]  ftp://ftp.am-utils.org/mirrors/os/linux/centos/
[DIR]  ftp://ftp.cs.rmit.edu.au/pub/centos/
[DIR]  ftp://ftp.uni-duesseldorf.de/pub/unix/linux/distributions/centos/
[DIR]  ftp://ftp.mathematik.uni-marburg.de/pub/mirror/centos/
[DIR]  ftp://ftp.net.usf.edu/pub/centos/
[DIR]  ftp://ftp.linux.cl/pub/centos/
[DIR]  ftp://ftp.dl.ac.uk/qcg/ccp1gui/centos/
[DIR]  ftp://ftp.tu-ilmenau.de/Mirrors/centos/
[DIR]  ftp://ftp.univ-montp2.fr/pub/linux/distributions/centos/
[DIR]  ftp://ftp.dulug.duke.edu/centos/
[DIR]  ftp://ftp.comu.edu.tr/pub/linux/dagitim/centos/
[DIR]  ftp://ftp.relline.ru/pub/unix/centos/
[DIR]  ftp://ftp.ip.pt/pub/centos/
[DIR]  ftp://64.50.238.52/.1/centos/
[DIR]  ftp://64.50.236.52/.1/centos/
[DIR]  ftp://147.52.159.12/mirrors/nongnu.org/smc/centos/
[DIR]  ftp://147.52.159.12/mirrors/linux/centos/
[DIR]  ftp://147.52.159.12/mirrors/linux/planetccrma/mirror/centos/
[DIR]  ftp://ftp.rtems.com/pub/rtems/linux/obsolete/4.9/centos/
[DIR]  ftp://ftp.rtems.com/pub/rtems/linux/4.10/centos/
[DIR]  ftp://ftp.rtems.com/pub/rtems/linux/4.7/centos/
[DIR]  ftp://ftp.rtems.com/pub/rtems/linux/4.8/centos/
[DIR]  ftp://ftp.nstu.ru/pub/linux/centos/
[DIR]  ftp://ftp.linet.gr.jp/pub/centos/
[DIR]  ftp://ftp.freesnmp.com/mirrors/centos/