That's just college advisors, no biggie! lol They are advisors with Collegebound Network (http://www.collegebound.net) - they help people connect with the colleges that they are interested in. You probably requested information online, or maybe someone else in your family did and used your #, or a friend/relative could have requested info for you? They are friendly and helpful people, they try hard to connect people with the right college! If you already found a college or are no longer interested, just let them know so they don't call ya. =)
According to the site you linked "The company provides recruitment marketing solutions to more than 1000+ colleges and universities through sites like CollegeSurfing.com and CollegeBound.net." They are not actually college advisors, they are sellers of online colleges, some of which are known to be scams and/or diploma mills. They collect phone numbers on some of the job hunting sites.
So basically they are just another brand of telemarketers. And they also need to learn about the do not call list.