How To Find Modem IP Address Behind Your Router

by John Sanderson
how to find modem ip address behind router

When you want to log into your router and change its settings, you may be surprised to see that the modem is not listed. This is because the modem doesn’t have a network interface card (NIC) or it has a built-in NIC but the interface’s IP address looks different from what you think it should be. If this is the case, then how can you find out what the IP address of your modem is?

How To Find Modem IP Address Behind Your Router?

1. Find the MAC address of your modem.

2. Log in to your router.

3. Go to the Status page and look for the MAC address of your modem in the list of connected devices.

4. Use that MAC address as the gateway address when you log in to your modem’s interface via a web browser.

5. Click on Setup and go to Advanced Setup > LAN Setup > IP Address Assignment and change it from DHCP to Static IP Address then enter your modem’s new IP address, Subnet Mask, and Gateway Address which you had found out earlier from your router’s Status page (usually 192.168.1.*). Save then restart your modem or router for changes to take effect if required by the manufacturer’s instructions.

6 . Now you can log in to your modem with its new IP address and make changes as needed, like enabling remote access or changing its password, etc.

Why Should You Need An IP Address Of Router?

1. You can use it to access your router’s interface using a web browser.

2. It is used to find out what your router’s IP address is if you don’t know the default gateway address or you have misplaced it.

3. It is used to find out what the IP address of your modem is if its network interface doesn’t show up in your router’s Status page and you need to log in to it and make changes.

4 . If you want to set up remote access for your modem or router, then you need its IP address as well as its username and password (if any).

5 . If you want to set up port forwarding for one of your computers that has a static public IP address, then you need the public IP address of that computer, which can be found by pinging it from another computer on the same network. To do this, first, find out the public IP addresses of all computers on your network by pinging them from another computer on that same network or using a tool like AngryIP Scanner, Fing or Nmap, etc., then enter those addresses as port forwarding ports in their respective interfaces, as described above.

Finding Multiple Modems Behind A Router

1. Find out the IP address of your router as described above.

2. Log in to your modem’s interface via a web browser.

3. Go to the Status page and look for the MAC address of your router (usually 192.168.1.*).

4 . Use that MAC address as the gateway address when you log in to your modem’s interface via a web browser and you will see all connected devices on the network including the router, which will show up as another device on its Status page if it is present behind that modem.

5 . Click on Setup and go to Advanced Setup > LAN Setup > IP Address Assignment and change it from DHCP to Static IP Address then enter your modem’s new IP address, Subnet Mask, and Gateway Address which you had found out earlier from your router’s Status page (usually 192.168 . 1.*). Save then restart your modem or router for changes to take effect if required by the manufacturer s instructions.

6 . Now you can log in to your modem with its new IP address and make changes as needed, like enabling remote access or changing its password, etc.

How To Increase Speed Of Router?

1. If your router is still using the default DNS servers, then change them to Google’s Public DNS servers and see if it helps.

2. If you have a dual-band router, then try changing the 2.4 GHz band channel to a higher number like 40 or 80 instead of the default 1 or 6 and see if it helps.

3 . Check your wireless devices’ Channel bandwidth setting and make sure that they are set to Auto 20/40 MHz, etc. if your router supports it.

4 . Make sure that both your wireless device and router are using the latest firmware available from their respective manufacturers’ websites.

5 . Enable WMM QoS on all Access Points in your network to prioritize wireless traffic for a better experience.

6 . If you want to use QoS for wired traffic as well, then make sure that you enable QoS at every stage of your network starting from each computer’s NIC card or motherboard (if possible), through its switch ports, up to the modem/router & access point (wireless), etc., so that every connected device will be able to prioritize its own traffic according to its needs for best performance and reliability, as explained in this link: How To Setup Quality Of Service For Network Traffic?

7 . If you have an old 802.11g or 802.11b access point/router at home or office that has been working fine with good signal strength but now gives poor speed or even drops the connection altogether, then you can try to replace it with a newer 802.11n or 802.11ac access point/router (if not already done so) and see if it helps.

8 . If none of the above helps, then try changing your Wi-Fi channel from the default 6 to any other channel in between 1 and 13, or switch your router’s mode from Mixed to G-Only or B-Only mode (in case of a dual-band router), or even disable Wi-Fi on your device(s) and just use an Ethernet cable for wired connectivity instead and see if it helps.

9 . Also make sure that you don’t have any other device using the same channel as your wireless router’s Wi-Fi network like another Wi-Fi router, cordless phone, microwave oven, etc., as they will create interference which will reduce your wireless speed considerably. Check our Wireless Channel Guide for more details on this issue: Wireless Channels – Which Is The Best?

10 . Upgrade both your wireless devices’ & router’s firmware to the latest available versions by visiting their manufacturers’ website and see if it helps.

Conclusion

In order to establish a connection between your device and the internet, a modem is needed. This modem is connected to a router that sends and receives data packets to and from the internet. Connecting to the internet is as simple as connecting to your router’s IP address.