Again, I don't have one so this is all from research.
My research shows the C6300 uses a power supply with input voltage of 100-240v and 50/60hz. I found this by both looking up genuine Netgear replacements and aftermarket replacements. Without you actually opening the box, thats as close as I can get.
Are you sure this modem/router combo device is compatible with the service you plan on getting? That'd be one of the main questions after power.
