Yes, in most circumstances. Since your cable modem must be registered with your ISP in order to function correctly, it’s essential to get one that is guaranteed to be compatible. While some ISPs will allow you to register any cable modem, the majority will refuse to set up one that isn’t on their authorized list. Fortunately, most major cable providers in the United States have already “pre-approved” all of the main manufacturers’ cable modems. This information is usually included on the package or the manufacturer’s website, but if you’re still unsure, you can always ask your cable provider whether the modem/router you’re contemplating will operate with their network.