Constant.com provides public software mirrors for a number of open source projects.
All mirrors are available via both IPv4 and IPv6.

Description Location
Antergos antergos.mirror.constant.com
Arch Linux arch.mirror.constant.com
CentOS centos.mirror.constant.com
Cygwin cygwin.mirror.constant.com
Debian debian.mirror.constant.com
ELRepo elrepo.mirror.constant.com
EPEL epel.mirror.constant.com
Fedora fedora.mirror.constant.com
GNU gnu.mirror.constant.com
IUS ius.mirror.constant.com
OpenBSD openbsd.mirror.constant.com
QT qt.mirror.constant.com
Raspbian raspbian.mirror.constant.com
Ubuntu ubuntu.mirror.constant.com
Ubuntu ISOs isos.ubuntu.mirror.constant.com