First, restart your router and check your cables. These quick fixes usually resolve the problem and get your devices online again. If that doesn't work, resetting your router's settings or updating its firmware can often do the. Is your router not assigning an IP address in 2025? In this video, I show you the NEW! Router Not Assigning IP Address – Quick Fix guide so you can restore proper network connectivity for all your devices. more. When a new device is connected, the modem does not recognize its MAC address and refuses to assign a public IP address from your Internet Service Provider (ISP). If you don't see it, click the navigation menu. But now I guess I have a whole little block, which I was initially kinda excited about but the more I troubleshoot the more I realize that I.