A:AnswerThis is for cable modem, not the traditional one you are talking about. This will definitely not fit.
You should look for DSL modems. To be sure look for the specific service you have and then find the right modem.
A:AnswerYour internet provider will be able to advise you if it is compatible with centurylink. They will need model # of the Netgear Nighthawk Dual Band modem/router.
A:AnswerThe box says compatible with Comcast/Xfinity, Spectrum and Cox. But it is compatible with more IP's. You can call Verizon and give them name of router/modem and model number and they will advise you whether it is compatible with Verizon.