Twin directories of ftp.isi.edu:

[DIR]  ftp://ftp.ox.ac.uk/pub/comp/security/COAST/mirrors/ftp.isi.edu/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/ietf/rfc/ftp.isi.edu/
[DIR]  ftp://ftp.jyu.fi/pub/mirrors/ftp.isi.edu/
[DIR]  ftp://ftp.sztaki.hu/pub/nic/rfc/ftp.isi.edu/
[DIR]  ftp://ftp.ietf.org/ietf-online-proceedings/RFCs_with_extra_files/ftp.isi.edu/
[DIR]  ftp://ftp.cbn.net.id/mirror/RFC/ftp.isi.edu/
[DIR]  ftp://ftp.cs.nott.ac.uk/sites/ftp.isi.edu/
[DIR]  ftp://ftp.nvg.ntnu.no/pub/mirrors/ftp.isi.edu/
[DIR]  ftp://ftp.li.kernel.org/pub/.2/www.ietf.org/rfc/ftp.isi.edu/
[DIR]  ftp://ftp.celestial.com/mirrors/ftp.isi.edu/
[DIR]  ftp://ftp.uevora.pt/mirrors/IETF/rfc/ftp.isi.edu/
[DIR]  ftp://ftp.ecc.u-tokyo.ac.jp/mirror/ftp.nic.ad.jp/mirror/internet/ftp.isi.edu/
[DIR]  ftp://ftp.happy.kiev.ua/pub/rfc/ftp.isi.edu/
[DIR]  ftp://ftp.esat.net/mirrors/.0/ftp.isi.edu/
[DIR]  ftp://ftp.kame.net/.mirror/ftp.isi.edu/
[DIR]  ftp://ftp.kame.net/.mirror/ftp.isi.edu/in-notes/ftp.isi.edu/
[DIR]  ftp://ftp.itojun.org/.mirror/ftp.ietf.org/rfc/ftp.isi.edu/
[DIR]  ftp://ftp.jyu.fi/pub/mirrors/ftp.isi.edu/rfc/ftp.isi.edu/
[DIR]  ftp://ftp.math.utah.edu/pub/mirrors/ftp.isi.edu/
[DIR]  ftp://ftp.math.utah.edu/pub/mirrors/ftp.isi.edu/rfc/ftp.isi.edu/
[DIR]  ftp://ftp.informatik.rwth-aachen.de/pub/mirror/ftp.isi.edu/
[DIR]  ftp://ftp5.freebsd.org/pub/ietf/rfc/ftp.isi.edu/
[DIR]  ftp://ftp.li.kernel.org/pub/.mirrors/2/download.eclipse.org/technology/higgins/downloads/sts.server.token.identity/lastReleaseBuild/javadoc/org/ftp.isi.edu/
[DIR]  ftp://ftp.li.kernel.org/pub/.3/www.ietf.org/rfc/ftp.isi.edu/
[DIR]  ftp://ftp.nrc.ca/pub/mirrors/by-site/ftp.isi.edu/
[DIR]  ftp://163.1.2.79/pub/comp/security/COAST/mirrors/ftp.isi.edu/
[DIR]  ftp://ftp.nic.ad.jp/mirror/internet/ftp.isi.edu/