What is my I.P. address?

When requesting technical support, you may sometimes be asked to provide the I.P. address of the PC on which you are working. This document explains how to find this information for PCs running various different operating systems.

Note: Many web sites offer to provide your I.P. address for you. These sites give you the I.P. address that your Internet connection presents to the world. This is almost always very different from the I.P. address that your PC uses to communicate with other devices on your local network. If you have been directed to this page by a Güralp support engineer, then you cannot use that type of web site and you must use a technique like the ones described here.

Please select your PC's operating system from the list below and click on the link:

Linux

On a Linux PC, open a terminal window by keying the control key+the alt key+the T key.

In the resulting window, type ip addr show. You will see output like

1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
        valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
        valid_lft forever preferred_lft forever
2: eno1:  mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 64:00:6a:79:66:b0 brd ff:ff:ff:ff:ff:ff
    inet 10.10.255.32/16 brd 10.10.255.255 scope global dynamic eno1
        valid_lft 437180sec preferred_lft 437180sec
    inet6 fe80::78a4:e711:2f75:6a84/64 scope link 
        valid_lft forever preferred_lft forever

This is a list of your network adaptors, along with some information about each. The first adaptor shown above, lo, is the "loopback adaptor", which is a special software device which emulates a physical network interface. The second, eno1, is the first physical Ethernet adaptor on your PC. Physical Ethernet adaptors typically have names like eth0, eth1, eno1, eno2 etc. You may also see WiFi network adaptors with names like wlan0.

Choose which adaptor is relevant to your enquiry and then look for the line labelled inet in the one of the following lines. The I.P. address is shown in CIDR format immediately after the word inet. In the example above, the I.P. address for eno1 is 10.10.255.32/16.

If you are not sure which is the relevant adaptor, look for the word UP or DOWN in the first line for each interface. This tells you whether that interface is currently connected or not. To be certain, you can unplug the relevant network cable (at either end) and then run the ip addr show command again to check that the status has changed from UP to DOWN - and back to UP when you reconnect the cable.

Windows command-line - all versions

Open a command window by double-clicking the appropriate icon, selecting Start → Run and typing cmd or typing cmd into the "Search" box and selecting "Command prompt" from the results:

When the command window opens, type the command ipconfig as shown:

The output is a list of your network adaptors, along with some information about each. (Only one adaptor is shown in the example above.) Choose which adaptor is relevant to your enquiry and then look in the following block for the line labelled "IPv4 Address". In the example above, the I.P. address for the interface labelled Ethernet adapter Local Area Connection is 10.10.0.3.

Windows 10

Click the Start icon and select Settings. Now click the "Network & Internet" icon:

  • To view the IP address of a wired connection, select "Ethernet" from the left menu pane and choose your network connection from the list. Your IP address will be shown as "IPv4 Address".
  • To view the IP address of a wireless connection, select "WiFi" from the left menu pane and click "Advanced Options". Your IP address will be shown as "IPv4 Address".

Windows 7, 8 or 8.1

Click the network connection icon () from the system tray and select "Open Network and Sharing Center".

  • To view the IP address of a wired connection, double-click "Local Area Connection" and then click "Details". Your IP address will be shown as "IPv4 Address".
  • To view the IP address of a wireless connection, double-click "Wireless Network Connection (…)" (for the appropriate network name, if you have more than one) and then click "Details". Your IP address will be shown as "IPv4 Address".

Windows Vista

Open the "Network and Sharing Center" by clicking on the "Start" menu, right-clicking "Network" and selecting "Properties" from the resulting context menu.

  • To view the IP address of a wired connection, click "View Status" to the right of "Local Area Connection" and then click Details. Your IP address will be shown as "IPv4 IP Address"
  • To view the IP address of a wireless connection, click "View Status" to the right of "Wireless Network Connection" and then click Details. Your IP address will be shown as "IPv4 IP Address"

Windows XP

Right-click "My Network Places" from the "Start" menu choose "Properties" from the resulting context menu.

  • To view the IP address of a wired connection, double-click "Local Area Connection" and then select the "Support" tab. Click the "Details" button: Your IP address will be shown in the resulting window
  • To view the IP address of a wireless connection, double-click "Wireless Network Connection" and then select the "Support" tab. Click the "Details" button: Your IP address will be shown in the resulting window

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