Twin directories of f2c:

[DIR]  ftp://ftp.ecc.u-tokyo.ac.jp/mirror/ftp1.debian.or.jp/debian/pool/pool/main/f/f2c/
[DIR]  ftp://ftp.duth.gr/pub/netlib/f2c/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/ports/local-distfiles/maho/f2c/
[DIR]  ftp://ftp.dk.freebsd.org/pub/FreeBSD/ports/local-distfiles/maho/f2c/
[DIR]  ftp://ftp.esat.net/mirrors/.3/ftp.netbsd.org/pub/NetBSD/packages/current-src/pkgsrc/lang/f2c/
[DIR]  ftp://ftp.in2p3.fr/pub/FreeBSD/ports/local-distfiles/maho/f2c/
[DIR]  ftp://ftp.zib.de/netlib/f2c/
[DIR]  ftp://128.118.2.96/pub/.mirrors/1/ftp.freebsd.org/pub/FreeBSD/ports/local-distfiles/maho/f2c/
[DIR]  ftp://128.118.2.96/pub/.mirrors/1/ftp.netbsd.org/pub/NetBSD/packages/current-src/pkgsrc/lang/f2c/
[DIR]  ftp://130.75.2.22/pub/mirror/linux/debian-mirror/debian-security/pool/updates/main/f/f2c/
[DIR]  ftp://130.75.2.22/pub/mirror/linux/debian-mirror/debian/pool/main/f/f2c/
[DIR]  ftp://ftp.ankara.edu.tr/ubuntu/pool/universe/f/f2c/
[DIR]  ftp://ftp.radio-msu.net/.1/ftp.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.rmt.ru/.1/ftp.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.funet.fi/.m/mirrors5/ftp.netbsd.org/pub/NetBSD/packages/current-src/pkgsrc/lang/f2c/
[DIR]  ftp://zoffy.asahi-net.or.jp/pub/linux/debian/debian/pool/main/f/f2c/
[DIR]  ftp://195.184.181.213/debian-security/pool/updates/main/f/f2c/
[DIR]  ftp://ftp.int-evry.fr/mirror1/ubuntu.com/ubuntu-cd/.debian-mirror/pool/main/f/f2c/
[DIR]  ftp://ftp.jp.xemacs.org/pub/NetBSD/packages/current-src/pkgsrc/lang/f2c/
[DIR]  ftp://ftp.aha.ru/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.uic.nnov.ru/pub/Linux/Debian/debian-amd64/pool/main/f/f2c/
[DIR]  ftp://ftp.man.szczecin.pl/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp5.jp.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.freebsdchina.org/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.za.freebsd.org/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.uvsq.fr/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp12.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.int.ru/.1/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.freebsd.org/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp2.sk.freebsd.org/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.esat.net/mirrors/.1/ftp.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.gwdg.de/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.sk.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.sh.cvut.cz/storage/1/freebsd/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.cse.buffalo.edu/mirror/BSD/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://128.118.2.96/pub/.mirrors/1/ftp.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://194.186.254.27/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://194.67.80.52/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.cerias.purdue.edu/pub/os/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.lucky.net/pub/FreeBSD/development/FreeBSD-CVS/ports/lang/f2c/
[DIR]  ftp://ftp.ps.pl/dsk0/ftp.freebsd.org/FreeBSD/ports/local-distfiles/maho/f2c/
[DIR]  ftp://ftp.gnome.org/cdimage/snapshot/Debian/pool/main/f/f2c/
[DIR]  ftp://ftp.univ-savoie.fr/pub1/ftp.fr.debian.org/debian/pool/main/f/f2c/
[DIR]  ftp://ftp.zcu.cz/pub/linux/debian/pool/main/f/f2c/
[DIR]  ftp://ftp.jp.xemacs.org/pub/linux/debian/debian/pool/main/f/f2c/
[DIR]  ftp://ftp.funet.fi/.m/mirrors3/ftp.debian.org/debian/pool/main/f/f2c/
[DIR]  ftp://ftp.song.fi/debian/pool/main/f/f2c/
[DIR]  ftp://ftp.duth.gr/pub/debian/pool/main/f/f2c/
[DIR]  ftp://ftp.song.fi/pub/mirrors/debian/pool/main/f/f2c/