Owner of the robot : RetSpan

Country : France

Robot type : probe (does not spider sites)

Description : Provides statistics on 404 errors in search engine result pages.

User Agent transmitted to the visited web server :

  • PeerFactor 404 crawler


IP address range : from to (

URL for more information :

Access control options understood by the robot :

    User Agent to use in the robots.txt file :

    Last visit of this robot logged in December 2005.
    Other informations updated on December 20, 2005.