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Instant Messengers - IP Addresses

  

Those pesky IM's can play havoc with your network security.  If you want to block them on your network, block the following IP addresses on your system.  Keep in mind some of these are entire block ranges so other services from these providers may also be blocked.  ----> Updated: June 2, 2004

AOL IM / ICQ
login.oscar.aol.com & login.icq.com (now together)
Default Port: 5190
specific target IP(s)
    64.12.200.89
    205.188.153.121
    205.188.179.233
    64.12.161.153
    64.12.161.185
range of IPs owned
    64.12.0.0 - 64.12.255.255
    205.188.0.0 - 205.188.255.255
   
MSN
messenger.hotmail.com
Default Port: 1863
specific target IP(s)
    207.46.104.20
range of IPs owned
    207.46.0.0 - 207.46.255.255
 
mail.hotmail.com
Default Port: 1863
specific target IP(s)
    65.54.254.129
    65.54.166.99
range of IPs owned
    65.52.0.0 - 65.55.255.255
 
nexus.passport.com
Default Port: 443
range of IPs owned
    65.52.0.0 - 65.55.255.255
 
login.passport.com
Default Port: 443
range of IPs owned
    65.54.183.198, 65.54.179.198
 
loginnet.passport.com
Default Port: 443
range of IPs owned
    65.54.179.192, 65.54.183.192
   
Trillian
ceruleanstudios.com
Default Port: 1863
specific target IP(s)
    66.216.70.167
range of IPs owned
    66.216.64.0 - 66.216.127.255 
   
Yahoo
cs.yahoo.com
Default Port: 5050
specific target IP(s)
    216.136.233.128
range of IPs owned
216.136.128.0 - 216.136.131.255
216.136.172.0 - 216.136.175.255
216.155.192.0 - 216.155.207.255
216.136.232.0 - 216.136.235.255
 
mail.yahoo.com
Default Port: ?
specific target IP(s)
    216.109.127.60
range of IPs owned
    216.109.112.0 - 216.109.127.255
 
yahoo.com
Default Port: ?
specific target IP(s)
    66.218.71.114
    216.109.127.28
    216.109.127.29
    216.109.127.30
    66.218.71.112
    66.218.71.113
range of IPs owned
    66.218.64.0 - 66.218.95.255
    216.109.112.0 - 216.109.127.255
   
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