Instructions apply broadly to all modems and router-modem combos.
kick off the Windows Command Prompt, theLinux Terminal, or theTerminal on Mac.
Typeipconfig(Windows) orifconfig(for Mac and Linux) and pressEnter.

Look for theDefault Gatewayline to find the IP address represented by a string of numbers and periods.
Why Do You Need a Modem’s IP Address?
You’ll need to know your modem’s IP address if you want to enter to your modem.
You may also need to know a modem’s IP address when setting up a computer web connection.
Does a Modem Have an IP Address?
All modems have a unique IP address, allowing other devices (computers, printers, etc.)
to communicate with them.
The steps for finding your modem’s IP address are essentially the same asfinding your local IP address.
Next, choose the connection you want to change.
You canrelease and renew an IP addressin Windows by opening the Command Prompt and enteringipconfig /releasefollowed byipconfig /renew.
Don’t worry if you get the same IP address again.