Twin directories of crc:

[DIR]  ftp://ftp.qms.com/pub/crc/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/tex-archive/tools/macunpack/crc/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/tex-archive/tools/macutils/crc/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/tex-archive/macros/latex209/contrib/crc/
[DIR]  ftp://ftp.kreonet.re.kr/CTAN/tools/macunpack/crc/
[DIR]  ftp://ftp.kreonet.re.kr/CTAN/tools/macutils/crc/
[DIR]  ftp://ftp.kreonet.re.kr/CTAN/macros/latex209/contrib/crc/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/gnu/tmp/linux-libre-fsf2_2.6.28/linux-2.6.28/debian/linux-headers-2.6.28-libre-fsf2/usr/src/linux-headers-2.6.28-l/crc/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/gnu/tmp/linux-libre-fsf2_2.6.28/linux-2.6.28/include/config/crc/
[DIR]  ftp://ftp.uni-koeln.de/tex/macros/latex209/contrib/crc/
[DIR]  ftp://ftp.wh2.tu-dresden.de/pub/mirrors/latex/dante/tools/macunpack/crc/
[DIR]  ftp://ftp.wh2.tu-dresden.de/pub/mirrors/latex/dante/tools/macutils/crc/
[DIR]  ftp://ftp.wh2.tu-dresden.de/pub/mirrors/latex/dante/macros/latex209/contrib/crc/
[DIR]  ftp://24.215.0.24/CTAN/tools/macunpack/crc/
[DIR]  ftp://24.215.0.24/CTAN/tools/macutils/crc/
[DIR]  ftp://24.215.0.24/CTAN/macros/latex209/contrib/crc/
[DIR]  ftp://ftp.sztaki.hu/pub/tex/macros/latex209/contrib/crc/
[DIR]  ftp://ftp.sztaki.hu/pub/tex/tools/macunpack/crc/
[DIR]  ftp://ftp.sztaki.hu/pub/tex/tools/macutils/crc/
[DIR]  ftp://ftp.tug.ctan.org/pub/tex-archive/tools/macunpack/crc/
[DIR]  ftp://ftp.tug.ctan.org/pub/tex-archive/tools/macutils/crc/
[DIR]  ftp://ftp.tug.ctan.org/pub/tex-archive/macros/latex209/contrib/crc/
[DIR]  ftp://ftp.dntis.ro/pub/.1/ftp.hacktic.nl/crypto/hashes/crc/
[DIR]  ftp://ftp.whtech.com/emulators/mess/Complete MESS Geneve emulation/mess/crc/
pkg://AdaCurses-4.2-1.i386.rpm:49164/ActiveTcl8.4.5.0-linux-ix86/lib/tcllib1.5/  info  downloads[DIR]3  AdaCurses-4.2-1.i386.rpm/ActiveTcl8.4.5.0-linux-ix86/lib/tcllib1.5/crc/
pkg://ArX-2.2.2.tar.gz:13358590/ArX-2.2.1/src/boost/libs/  downloads[DIR]3  ArX-2.2.2.tar.gz/ArX-2.2.1/src/boost/libs/crc/
pkg://ArX-2.2.3.tar.gz:13402310/ArX-2.2.2/src/boost/libs/  downloads[DIR]3  ArX-2.2.3.tar.gz/ArX-2.2.2/src/boost/libs/crc/
pkg://ArX-2.2.4.tar.gz:13561129/ArX-2.2.3/src/boost/libs/  downloads[DIR]3  ArX-2.2.4.tar.gz/ArX-2.2.3/src/boost/libs/crc/
pkg://ArX-2.2.4nb6.tgz:1312417/ArX-2.2.4/src/boost/libs/  downloads[DIR]3  ArX-2.2.4nb6.tgz/ArX-2.2.4/src/boost/libs/crc/
[DIR]  ftp://ftp.linuxforum.hu/uhulinux/mirror/ftp:/ftp.minolta-qms.com/pub/crc/
[DIR]  ftp://ftp.crc.ca/crc/
[DIR]  ftp://ftp.ucc.ie/pub/crc/
[DIR]  ftp://ftp.tu-ilmenau.de/Mirrors/tex/tools/macunpack/crc/
[DIR]  ftp://ftp.tu-ilmenau.de/Mirrors/tex/tools/macutils/crc/
[DIR]  ftp://ftp.tu-ilmenau.de/Mirrors/tex/macros/latex209/contrib/crc/
pkg://alphatk.tar.gz:10518797/Alphatk/AlphaTcl/Tclextensions/tcllib1.7.0.1/  downloads[DIR]3  alphatk.tar.gz/Alphatk/AlphaTcl/Tclextensions/tcllib1.7.0.1/crc/
[DIR]3  alphatk.tar.gz/Alphatk/AlphaTcl/Tclextensions/tcllib1.7.0.1/crc/
pkg://alphatk.tar.gz:2437526/Alphatk/Alpha/Tclextensions/tcllib1.7.0.1/  downloads[DIR]3  alphatk.tar.gz/Alphatk/Alpha/Tclextensions/tcllib1.7.0.1/crc/
[DIR]  ftp://ftp.cvut.cz/mirrors/ctan.org/tools/macunpack/crc/
[DIR]  ftp://ftp.cvut.cz/mirrors/ctan.org/tools/macutils/crc/
[DIR]  ftp://ftp.cvut.cz/mirrors/ctan.org/macros/latex209/contrib/crc/
[DIR]  ftp://ftp1.sinica.edu.tw/pub1/tex/tools/macunpack/crc/
[DIR]  ftp://ftp1.sinica.edu.tw/pub1/tex/tools/macutils/crc/
[DIR]  ftp://ftp1.sinica.edu.tw/pub1/tex/macros/latex209/contrib/crc/
[DIR]  ftp://ftp.botik.ru/rented/znamensk/CTAN/tools/macunpack/crc/
[DIR]  ftp://ftp.botik.ru/rented/znamensk/CTAN/tools/macutils/crc/
[DIR]  ftp://ftp.botik.ru/pub/unix/mail/smail/crc/
[DIR]  ftp://ftp.botik.ru/rented/znamensk/CTAN/macros/latex209/contrib/crc/
[DIR]  ftp://ftp.int.ru/.1/CTAN/tools/macunpack/crc/
[DIR]  ftp://ftp.int.ru/.1/CTAN/tools/macutils/crc/