What is the IP Address of a Broadband Router?

Broadband router and people using computers
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A home broadband router manages two IP addresses - one for devices on the local area network (LAN) and one for communication with the external Internet (WAN) connection.

How to Find a Broadband Router's Local Network Address

Home routers set their local address to a default, private IP address number. For example:

  • Linksys router models typically use 192.168.1.1 for their default internal address.
  • D-Link and Netgear routers typically use 192.168.0.1
  • Some Belkin and SMC routers use 192.168.2.1
  • US Robotics routers use 192.168.123.254, and so on

No matter the brand of router, its default internal IP address is listed in the manufacturer's documentation (and other places on the Internet). Administrators have the option to change this IP address during router setup or at any time later. Unlike other IP addresses on home networks that change dynamically, the router's private IP address remains static (fixed) unless someone manually changes it. The current address can be viewed and changed from the router's administrative console.

How to Find the Router's Outbound Network Address

The external facing address managed by a router is set when the router connects to the Internet service provider via a broadband modem . This address can also be viewed on the router's console. Alternatively, the WAN address can be found by visiting a Web-based IP address lookup service like checkip.dyndns.org from any computer on the home network.

Another way to identify the public IP addresses of routers involves executing a ping or traceroute command from a computer connected to the router such as a Windows PC, Apple or Chrome system. From inside the home network, the command "ping -r 1" sends a message through the home router that will cause its IP address to be displayed in addition to that of the ping target.

For example, "ping -r 1 www.yahoo.com" should result in a message like the following displayed on the command prompt:

ping -r 1 www.yahoo.com

Reply from 66.94.230.43: bytes=32 time=294ms TTL=56
Route: 209.179.21.76
...

In this example, the IP address after "Route:" (209.179.21.76) corresponds to the router WAN address.

Other Considerations

The public IP address of a home network may change periodically as the Internet provider can re-allocate it different addresses from their pool.

The above explanations apply to traditional IPv4 addressing most commonly used on networks. The newer IPv6 uses a different numbering system for its IP addresses (although similar concepts apply).

On corporate networks, network discovery services based on Simple Network Management Protocol (SNMP) can automatically determine the IP addresses of routers and many other network devices.

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