Internet access from the cable TV companies. The coaxial cable coming into the home or building is split into one line for the cable modem and another line for the TV set-top box. See cable modem
Plenty of Cable Providers in the U.S.
As of 2023, there are several hundred cable Internet service providers (ISPs) in the U.S. Comcast, AT&T, Verizon, Charter, Cox and MediaCom are examples of the largest. Many regional providers service a small area. See ISP