http://mirror.linux.pizza/ubuntu/
http://ftp.lysator.liu.se/ubuntu/
https://ftpmirror1.infania.net/ubuntu/
http://mirror.zetup.net/ubuntu/
http://mirror.operationtulip.com/ubuntu/
http://ubuntu.mirror.su.se/ubuntu/
https://mirror.duvaliden.com/ubuntu/
http://mirrors.c0urier.net/linux/ubuntu/
http://ftp.acc.umu.se/ubuntu/
http://archive.ubuntu.com/ubuntu/