If you don't have school-age children who might have put their home number down during testing, it could have been a prank in itself where someone else put your number down or it was given to them by mistake. They can bypass the DNC because every number they call is submitted to them, usually on a form. They are (aggressively) trying to finance students to go to one of their client colleges.
This number is a college recruiting agency and they don't normally call from the actual city of the school; They are a type of private college financing, fund-raising and recruiting business.
These people called me twice this evening because my teenage son said "Yes, I'd be interested in going to college in [x] Hawaii [X] Oregon [X] Washington" during some college prep testing at his high school. However, I am not interested in sending my son to any of those places so he can pay for it himself or go here, locally.
Our kids are overriding our DNC listing by "inviting" them to call. (sort of like inviting vampires into your home)