Centurylink modems are advanced with ease to use and a higher level of compatibility. This is the reason why these modems are widely trusted and used. These modems come with built-in routers. It means that you need to make sure to replace both products if you are not using their modem. However, in any case, the best is to use both products from CenturyLink. Some of the best options are; ActionTec C1000A (Modem/Router Combo), ZyXEL C1100Z (Router Modem VDSL Combo), and the D-Link DIR-850L (Router Only).