Quote: darnelljason12Mediacom Communications Corporation is a company of American Telecommunications. It was founded by Rocco B. Commisso, in June 1995. Now, the webmail service is the Mchsi Email login. Both their paying subscribers will get this. Mediacom services can be used in over 23 US states. The enterprise provides a wide variety of services. From being an ISP to getting Cable TV, and more. For cable networks it is one of the top ten. As of March 2011 Mediacom became a private corporation. Previous to this, it was a publicly traded firm.