3com Passwords

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Setup Router Staff
March 05, 2020 (Last Updated: ) | Reading Time: 4 minutes

Here is a list of all the username and password combinations that we are aware of for 3com routers.

3com Model Username Password
3c510 blank admin
3c855 blank admin
3C857 blank admin
3CP4130 admin 1234
3cr856-95 blank admin
3CR858-91 blank admin
3CR858-91 blank admin
3cr860-95 blank 1234
3CRWDR100A-72 blank admin
3CRWDR101A-75 blank admin
3CRWDR101A-75 blank admin
3CRWDR101E-75 blank admin
3CRWDR101E-75 blank admin
3CRWDR300A-73 blank admin
3crwe51196 blank admin
3crwe52196 blank admin
3crwe554G72 blank admin
3CRWE554G72T admin admin
3CRWE754G72 blank admin
3CRWER100-75 blank admin
3CRWER100-75 blank admin
3CRWER200-75 blank admin
3CRWER300-73 blank admin
WL522 blank admin
WL540 blank admin

These are the factory default passwords for 3com routers. If you have changed the password in your router, then you need to use the new password that you have set.

This list does not include 3com WiFi passwords and will not help you connect to your WiFi network.

How To Login to a 3com Router

3com routers have many settings that can be adjusted depending on your needs, such as WiFi network name, password, parental controls, and traffic prioritization. To access these settings, you need to login to your router's built-in firmware.

To access your router's settings, you can use a standard web browser such as Chrome, Firefox, or Edge. It does not matter which web browser you use.

In general, the steps to log in to a 3com router are the same no matter which model of router you have. Here's what you do:

  • Find your router's internal IP address.
  • Put that IP address in your web browser address bar.
  • Login with your router's username and password.

We cover all of these steps below, including how to find your router's IP address and a list of all known default 3com passwords.

Find Your 3com Router's IP Address

To login to your router, you need to know it's IP address. All 3com routers have 2 IP addresses, but we are only interested in your router's internal IP address.

  • Internal IP address - used for local configuration from inside your network.
  • External IP address - used by your friends and coworkers to connect to you from the internet side of things.

Since we are configuring your router from inside your network, we need to know the internal IP address. From here on, for simplicity, we will refer to your router's internal IP address as it's IP address. Just remember that whenever we say IP address, we mean internal IP address.

You can find your router's IP address any of the following ways:

The simplest way to find your 3com IP address is to try all known default IP addresses. Here are all the known default 3com IP addresses.

3com Model IP Address
3c510 192.168.2.1
3c855 192.168.2.1
3C857 192.168.1.1
3CP4130 192.168.200.254
3cr856-95 192.168.1.1
3CR858-91 192.168.1.1
3cr860-95 192.168.1.1
3CRWDR100A-72 192.168.1.1
3CRWDR101A-75 192.168.1.1
3CRWDR101E-75 192.168.1.1
3CRWDR300A-73 192.168.1.1
3CRWDR300A-73 192.168.5.1
3crwe51196 192.168.1.1
3crwe52196 192.168.1.1
3crwe53172 192.168.2.1
3crwe554G72 192.168.1.1
3CRWE554G72T 192.168.1.1
3CRWE754G72 192.168.2.1
3CRWER100-75 192.168.1.1
3CRWER200-75 192.168.1.1
3CRWER300-73 192.168.1.1
WL522 192.168.1.1
WL540 192.168.1.1

Start with the first IP address in the list and try to login to your router with it. To login to your router, follow the steps outlined below.

If the IP address you picked does not work, then try a different one. It is harmless to try all the listed IP addresses since the only thing that we are doing here is trying to access the firmware settings of your router.

How To Login To a 3com Router

Once you have an IP address that you want to try, it's time to use your web browser to log in. Find the address bar in your web browser. It looks something like this:

Address Bar

Type your router's IP address into the address bar and press the Enter key on your keyboard. You should see either your router's home screen or a screen asking for your username and password.

If you do not see anything or you get an error that says This site can't be reached then the IP address that you are trying is wrong. Go back to the list of IP addresses above and try a different one.

If you try all the IP addresses above and still cannot log in, then you can follow our How to Find Your Router's IP Address guide.

3com Default Username and Password

You need to know your 3com username and password to login to your router. If you are not sure what your router's username and password are, then your router may still be set to the factory defaults. If your password does not work, you can try all the default 3com passwords and see if any of them work. Keep trying them all until you get logged in.

3com Model Username Password
3c510 blank admin
3c855 blank admin
3C857 blank admin
3CP4130 admin 1234
3cr856-95 blank admin
3CR858-91 blank admin
3CR858-91 blank admin
3cr860-95 blank 1234
3CRWDR100A-72 blank admin
3CRWDR101A-75 blank admin
3CRWDR101A-75 blank admin
3CRWDR101E-75 blank admin
3CRWDR101E-75 blank admin
3CRWDR300A-73 blank admin
3crwe51196 blank admin
3crwe52196 blank admin
3crwe554G72 blank admin
3CRWE554G72T admin admin
3CRWE754G72 blank admin
3CRWER100-75 blank admin
3CRWER100-75 blank admin
3CRWER200-75 blank admin
3CRWER300-73 blank admin
WL522 blank admin
WL540 blank admin

Some routers lock you out after trying too many incorrect passwords. If this happens, then just let it timeout for a minute and try again.

Forgot 3com Password

If you have changed your 3com password and forgot it, then you have the following choices:

Resetting your router can be a very time-consuming process and may require contacting your ISP to get connected to the internet again. Please do not reset your router until you have tried every other way of getting logged in.