Twin directories of bind:

[DIR]  ftp://ftp.ecc.u-tokyo.ac.jp/mirror/ftp1.debian.or.jp/debian/pool/pool/main/b/bind/
[DIR]  ftp://ftp.au.netbsd.org/pub/NetBSD/NetBSD-current/src/dist/bind/
[DIR]  ftp://ftp.dei.uc.pt/pub/linux/gentoo/portage/net-dns/bind/
[DIR]  ftp://ftp.zcu.cz/pub/network/bind/
[DIR]  ftp://ftp.linuxforum.hu/mirrors/frugalware/pub/other/people/boobaa/interim/source/network/bind/
[DIR]  ftp://128.118.2.96/pub/.mirrors/1/ftp.netbsd.org/pub/NetBSD/NetBSD-current/src/dist/bind/
[DIR]  ftp://128.118.2.96/pub/.mirrors/1/ftp.netbsd.org/pub/NetBSD/NetBSD-current/src/usr.sbin/bind/
[DIR]  ftp://128.118.2.96/pub/.mirrors/1/ftp.netbsd.org/pub/NetBSD/NetBSD-release-4-0/src/dist/bind/
[DIR]  ftp://128.118.2.96/pub/.mirrors/1/ftp.netbsd.org/pub/NetBSD/NetBSD-release-4-0/src/usr.sbin/bind/
[DIR]  ftp://128.118.2.96/pub/.mirrors/1/ftp.netbsd.org/pub/NetBSD/NetBSD-release-3-1/src/dist/bind/
[DIR]  ftp://128.118.2.96/pub/.mirrors/1/ftp.netbsd.org/pub/NetBSD/NetBSD-release-3-1/src/usr.sbin/bind/
[DIR]  ftp://128.118.2.96/pub/.mirrors/1/ftp.netbsd.org/pub/NetBSD/NetBSD-release-3-0/src/dist/bind/
[DIR]  ftp://128.118.2.96/pub/.mirrors/1/ftp.netbsd.org/pub/NetBSD/NetBSD-release-3-0/src/usr.sbin/bind/
[DIR]  ftp://ftp.tpnet.de/pub/pc/linux/bind/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/NetBSD-current/src/dist/bind/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/NetBSD-current/src/usr.sbin/bind/
[DIR]  ftp://ftp.esat.net/mirrors/.3/ftp.netbsd.org/pub/NetBSD/NetBSD-current/src/dist/bind/
[DIR]  ftp://ftp.esat.net/mirrors/.3/ftp.netbsd.org/pub/NetBSD/NetBSD-current/src/usr.sbin/bind/
[DIR]  ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-current/src/dist/bind/
[DIR]  ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-current/src/usr.sbin/bind/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/NetBSD-current/src/dist/bind/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/NetBSD-current/src/usr.sbin/bind/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/NetBSD-release-4-0/src/dist/bind/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/NetBSD-release-4-0/src/usr.sbin/bind/
[DIR]  ftp://ftp.esat.net/mirrors/.3/ftp.netbsd.org/pub/NetBSD/NetBSD-release-4-0/src/dist/bind/
[DIR]  ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-release-4-0/src/dist/bind/
[DIR]  ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-release-4-0/src/usr.sbin/bind/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/NetBSD-release-4-0/src/dist/bind/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/NetBSD-release-4-0/src/usr.sbin/bind/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/NetBSD-release-3-1/src/dist/bind/
[DIR]  ftp://ftp.esat.net/mirrors/.3/ftp.netbsd.org/pub/NetBSD/NetBSD-release-3-1/src/dist/bind/
[DIR]  ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-release-3-1/src/dist/bind/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/NetBSD-release-3-1/src/usr.sbin/bind/
[DIR]  ftp://ftp.esat.net/mirrors/.3/ftp.netbsd.org/pub/NetBSD/NetBSD-release-3-1/src/usr.sbin/bind/
[DIR]  ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-release-3-1/src/usr.sbin/bind/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/NetBSD-release-3-0/src/dist/bind/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/NetBSD-release-3-0/src/usr.sbin/bind/
[DIR]  ftp://ftp.esat.net/mirrors/.3/ftp.netbsd.org/pub/NetBSD/NetBSD-release-3-0/src/dist/bind/
[DIR]  ftp://ftp.esat.net/mirrors/.3/ftp.netbsd.org/pub/NetBSD/NetBSD-release-3-0/src/usr.sbin/bind/
[DIR]  ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-release-3-0/src/dist/bind/
[DIR]  ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-release-3-0/src/usr.sbin/bind/
[DIR]  ftp://ftp.linuxforum.hu/mirrors/frugalware/pub/other/people/vmiklos/kernel2626/source/network/bind/
[DIR]  ftp://ftp.linuxforum.hu/mirrors/frugalware/pub/other/people/voroskoi/wipv/source/network/bind/
[DIR]  ftp://ftp.manet.nu/pub/bind/
[DIR]  ftp://ftp.au.netbsd.org/pub/NetBSD/NetBSD-current/src/usr.sbin/bind/
[DIR]  ftp://ftp.ustb.edu.cn/pub/bind/
[DIR]  ftp://ftp.esat.net/mirrors/.3/ftp.netbsd.org/pub/NetBSD/NetBSD-release-4-0/src/usr.sbin/bind/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/debian-security/pool/updates/main/b/bind/
[DIR]  ftp://ftp.li.kernel.org/pub/.6/gentoo-portage/net-dns/bind/
[DIR]  ftp://ftp.linux.hr/gentoo/portage/net-dns/bind/