Internet connect and net 75 route installed

running 10.4.10 I am connecting to the internet via the internet connect software. After I connet I get a default route but also a net 75.0.0.0 route with the ppp0 gateway gets install. I am trying to figure out what is responsible for installing the route. The console logs do not show any log entries that
I have to manually remove this route when I disconnect so until then anything destined for net 75 is blackholed.
Any clues how I can figure out what is responsible for installing the route and perhaps, how I can stop the route from being install.
Internet:
Destination Gateway Flags Refs Use Netif Expire
default link#10 UCSc 6 0 en2
66.174.30.4 75.208.81.118 UGHS 0 0 en2
66.174.31.4 75.211.76.166 UGHS 0 0 en0
75 link#10 UCSc 0 0 en2
127 127.0.0.1 UCS 0 0 lo0
127.0.0.1 127.0.0.1 UH 22 146559 lo0
169.254 link#10 UCS 0 0 en2
169.254.252.63 127.0.0.1 UHS 0 24 lo0
192.168.0 link#9 UC 0 0 vmnet1
192.168.149 link#8 UC 0 0 vmnet8

Since the route is for the entire 75/8 subnet and it's assigned to link#10 that implies that your machine has an interface in the 75/8 network.
Since 75/10 is assigned to SBCIS (now AT&T) and 75.64/13 is Comcast (who used to be run by AT&T), it seems clear that AT&T and/or Comcast is your ISP.
It's very common for cable companies to use very large subnets for their network.
At the end of the day, though, this indicates perfectly normal behavior and you are going to run into problems if you try to blackhole that network since it is required to talk to the upstream AT&T/Comcast routers.
If you're worried about sitting in the middle of such a big subnet (along with all your neighbors, etc.), well... that's what NAT routers are for.

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64 bytes from 64.233.167.99: icmp_seq=0 ttl=244 time=215.362 ms
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