Twin directories of slackware:

[DIR]  ftp://ftp.rz.tu-bs.de/pub/mirror/ALL_primary_servers/rsync/ftp.slackware.com/slackware/
[DIR]  ftp://ftp.rz.tu-bs.de/pub/mirror/ALL_primary_servers/rsync/ftp.slackware.com/slackware/slackware-current/slackware/
[DIR]  ftp://ftp.saintjoe.edu/pub/linux/slackware/slackware-current/slackware/
[DIR]  ftp://ftp.funet.fi/.m/mirrors2/ftp.slackware.com/pub/slackware-current/slackware/
[DIR]  ftp://ftp.skynet.be/mirror1/slackware.com/slackware-current/slackware/
[DIR]  ftp://ftp.eutelia.it/pub/Slackware_Mirror/slackware-current/slackware/
[DIR]  ftp://ftp.biochem.uthscsa.edu/pub/linux/slackware/slackware-current/slackware/
[DIR]  ftp://ftp.splack.org/pub/slackware/slackware-current/slackware/
[DIR]  ftp://ftp.slackware.at/slackware-current/slackware/
[DIR]  ftp://ftp.swin.edu.au/slackware/slackware-current/slackware/
[DIR]  ftp://83.166.201.99/slackware/
[DIR]  ftp://ftp.bit.nl/mirror/slackware/slackware-current/slackware/
[DIR]  ftp://83.166.201.99/slackware/slackware-current/slackware/
[DIR]  ftp://ftp.devall.hu/slackware/slackware-current/slackware/
[DIR]  ftp://ftp.cs.rose-hulman.edu/slackware/
[DIR]  ftp://ftp.cs.rose-hulman.edu/slackware/slackware/
[DIR]  ftp://ftp.slackware.com/pub/slackware/
[DIR]  ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/
[DIR]  ftp://193.226.140.51/slackware/
[DIR]  ftp://ftp.tu-chemnitz.de/.SAN0/pub/linux/slackware/
[DIR]  ftp://ftp.monash.edu/pub/linux/slackware/
[DIR]  ftp://ftp.lug.udel.edu/pub/slackware/
[DIR]  ftp://128.118.2.96/pub/.mirrors/2/ftp.slackware.com/pub/slackware/
[DIR]  ftp://ftp.demon.nl/disk4/slackware/slackware-current/slackware/
[DIR]  ftp://77.88.19.68/slackware/
[DIR]  ftp://ftp.uvsq.fr/pub/slackware/
[DIR]  ftp://ftp.splack.org/pub/slamd64/slamd64-12.1/slackware/
[DIR]  ftp://ftp.slamd64.be/slamd64-12.1/slackware/
[DIR]  ftp://77.88.19.68/slamd64/slamd64-12.1/slackware/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/slackware/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/slackware/slackware/
[DIR]  ftp://ftp.uni-siegen.de/pub/slackware/
[DIR]  ftp://ftp.duth.gr/pub/slackware/slackware-current/slackware/
[DIR]  ftp://ftp.ecc.u-tokyo.ac.jp/mirror/ftp.slackware.com/pub/slackware/
[DIR]  ftp://ftp.esat.net/mirrors/.0/ftp.slackware.com/pub/slackware/
[DIR]  ftp://147.52.159.12/mirrors/linux/slackware/
[DIR]  ftp://64.50.236.52/.1/slackware/slackware-current/slackware/
[DIR]  ftp://64.50.238.52/.1/slackware/slackware-current/slackware/
[DIR]  ftp://ftp.ecc.u-tokyo.ac.jp/mirror/ftp.slackware.com/pub/slackware/slackware-current/slackware/
[DIR]  ftp://ftp.esat.net/mirrors/.0/ftp.slackware.com/pub/slackware/slackware-current/slackware/
[DIR]  ftp://147.52.159.12/mirrors/linux/slackware/slackware-current/slackware/
[DIR]  ftp://128.118.2.96/pub/.mirrors/2/ftp.slackware.com/pub/slackware/slackware-current/slackware/
[DIR]  ftp://ftp.sai.msu.su/pub/Linux/slackware-current/slackware/
[DIR]  ftp://ftp.man.szczecin.pl/pub/Linux/slackware/slackware-current/slackware/
[DIR]  ftp://ftp.rnl.ist.utl.pt/pub/slackware/slackware-current/slackware/
[DIR]  ftp://ftp.uvsq.fr/pub/slackware/slackware-current/slackware/
[DIR]  ftp://ftp.slackware-brasil.com.br/slackware-current/slackware/
[DIR]  ftp://193.226.140.51/slackware/slackware-current/slackware/
[DIR]  ftp://77.88.19.68/slackware/slackware-current/slackware/
[DIR]  ftp://130.75.2.22/pub/mirror/linux/slackware/