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I believe this one is only a router. That is how I am using it. Comcast/Xfinity keeps a list of compatible modems for your level of service with them. The NetGear I am linking appear to work, so check Best Buy for: https://www.netgear.com/images/datasheet/networking/cablemodems/C3700v2.pdf Looks to me like : https://www.bestbuy.com/site/netgear-dual-band-n600-router-with-8-x-4-docsis-3-0-cable-modem-black/3707003.p?skuId=3707003
I would recommend:
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