How to change DHCP settings on your modem

Dynamic Host Configuration Protocol (DHCP) settings allow you to set the parameters for how your modem assigns IP addresses to devices on your network.

Proceed with caution! CenturyLink recommends that you keep the default settings for the LAN IP address. Changes to this feature will reset other settings on your modem as well. Proceed only if you understand the technical impacts of this feature.


If you need to restore the default CenturyLink IP addressing values, they are:

  • DHCP Server: Enable
  • Modem IP Address:
  • Beginning DHCP Server Address:
  • Ending DHCP Server Address:
  • Subnet mask:

Note:  Your modem settings may appear slightly different from the images below, but the steps will be the same.

5. Select DHCP Settings in the left sidebar.  This menu option may appear in the LAN Settings section or in the IP Addressing section, depending on your model.

DHCP Settings Step 5

6. Follow the steps to edit the DHCP settings.

  • Step 1:  Enable/Disable the DHCP server.

  • Step 2:  Enter the IP addressing values to be allocated.

  • Step 3:  Enter the DHCP server lease time.

  • Step 4:  Enable/Disable DHCP reservations.

  • Step 5:  Set the DNS type as Default or Custom.

  • Step 6:  Click "Apply" to save your changes.
DHCP Settings Step 6

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