This is one of the last "true" no banner ad Free Dial Up Isp's out there.
There coverage areas are in the following states:
New Hampshire, Massachusetts and Rhode Island
Check out there access numbers, and read there TOS (terms of service) here:
Pretty awesome that there are still people out there..
... that allow this sort of free access.
They also have broadband access.. that is not free, but worth checking out..