The Motorola MG7315, MG7540, MG7550, and MG7700 have a built-in wireless router.) Requires cable Internet service.Approved by and for use with Comcast Xfinity and Xfinity X1, Cox, Charter Spectrum ...

Locating local internet providers Comcast Xfinity is the nation's largest cable internet provider, with serviceability in 39 states and Washington, DC.

That said, while modern cable modem/routers are very capable if you have more advanced needs, there are many more options and advanced features to be found among the best wireless routers.