Twin directories of isos:

[DIR]  ftp://ftp.cesca.es/mirror2/softcatala/softcatala/cd-roms/isos/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors/centos/4.6/isos/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors/centos/4.7/isos/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/Linux/centos/4.7/isos/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/Linux/centos/4.8/isos/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/Linux/centos/5.3/isos/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/Linux/centos/4.4/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/mirror.centos.org/4.7/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/mirror.centos.org/4.8/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/mirror.centos.org/2.1/final/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/mirror.centos.org/3.9/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/ftp.redhat.com/pub/redhat/linux/enterprise/4/en/RHAPS2/i386/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/ftp.redhat.com/pub/redhat/linux/enterprise/4/en/RHAPS2/ia64/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/ftp.redhat.com/pub/redhat/linux/enterprise/4/en/RHAPS2/ppc/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/ftp.redhat.com/pub/redhat/linux/enterprise/4/en/RHAPS2/x86_64/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/ftp.redhat.com/pub/redhat/linux/enterprise/4/en/RHDS2.1/i386/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/ftp.redhat.com/pub/redhat/linux/enterprise/4/en/RHDS2.1/ia64/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/ftp.redhat.com/pub/redhat/linux/enterprise/4/en/RHDS2.1/ppc/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/ftp.redhat.com/pub/redhat/linux/enterprise/4/en/RHDS2.1/x86_64/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/ftp.redhat.com/pub/redhat/linux/enterprise/4/en/RHDS3/i386/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/ftp.redhat.com/pub/redhat/linux/enterprise/4/en/RHDS3/ia64/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/ftp.redhat.com/pub/redhat/linux/enterprise/4/en/RHDS3/ppc/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/ftp.redhat.com/pub/redhat/linux/enterprise/4/en/RHDS3/x86_64/isos/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/mirror.centos.org/5.3/isos/
[DIR]  ftp://ftp.ourproject.org/pub/openapps/isos/
[DIR]  ftp://ftp.wicks.co.nz/pub/linux/dist/centos/4.8/isos/
[DIR]  ftp://ftp.wicks.co.nz/pub/linux/dist/centos/4.7/isos/
[DIR]  ftp://ftp.wicks.co.nz/pub/linux/dist/centos/3.9/isos/
[DIR]  ftp://ftp.rdc.cl/pub/Unix/centos/4.8/isos/
[DIR]  ftp://ftp.rdc.cl/pub/Unix/centos/4.7/isos/
[DIR]  ftp://ftp.fagskolen.gjovik.no/pub/centos/5.0/isos/
[DIR]  ftp://ftp.wustl.edu/pub/linux/distributions/centos/4.8/isos/
[DIR]  ftp://ftp.wustl.edu/pub/linux/distributions/centos-beta/centos/4.1beta/isos/
[DIR]  ftp://ftp.wustl.edu/pub/linux/distributions/centos-beta/centos/4.2beta/isos/
[DIR]  ftp://ftp.wustl.edu/pub/linux/distributions/centos-beta/centos/4.3beta/isos/
[DIR]  ftp://ftp.wustl.edu/pub/linux/distributions/centos/4.7/isos/
[DIR]  ftp://ftp.wustl.edu/pub/linux/distributions/centos/3.9/isos/
[DIR]  ftp://ftp.wustl.edu/pub/linux/distributions/centos/2.1/final/isos/
[DIR]  ftp://ftp.tu-darmstadt.de/pub/os/Linux/isos/
[DIR]  ftp://ftp.tugraz.at/ftp.tu-graz.ac.at/.mirror-sites/eu-msync.centos.org/4.7/isos/
[DIR]  ftp://ftp.jyu.fi/pub/mirrors/ftp.redhat.com/redhat/powertools/6.2/isos/
[DIR]  ftp://ftp.cs.uni-bonn.de/pub/mirror/centos/4.7/isos/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/linux/scientific/RHAPS/i386/isos/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/linux/centos/4.8/isos/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/linux/centos/5.3/isos/
[DIR]  ftp://ftp.ai.kyutech.ac.jp/.disk2/CentOS/4.6/isos/
[DIR]  ftp://ftp.ai.kyutech.ac.jp/.disk2/CentOS/4.7/isos/
[DIR]  ftp://ftp.ai.kyutech.ac.jp/.disk2/CentOS/5.2/isos/
[DIR]  ftp://ftp.cc.keio.ac.jp/centos-vault/4.4/isos/
[DIR]  ftp://ftp.uni-koeln.de/mirrors/centos/3.8/isos/