Thanks for the quick response.
I was thinking more of the base IP of the device itself.
Meaning that the device has an ip of 192.168.0.1 by default.
The DHCP assigns ip's from 192.168.0.100 - 192.168.0.199
I have the option of changing the device ip to say 210.210.0.1
and thus causing the DHCP to assign ip's from 210.210.0.100 - 210.210.0.199
In other words, does it give the potential hacker any advantage in knowing
that many routers come with a default ip of 192.168.0.1?
(given of course that all passwords are changed, mac filtering on,DHCP ranges shortened as you suggested, WAN pings disabled, etc etc)