Modem and Equipment Support

Learn about your CenturyLink modem

Top modems

Look for the model number on your modem sticker

C4000

C3510XZ

C3000

C2300A

PK5000Z

C2100

Fiber modems

C4000XG

C424G

C844G

C5500XK SmartNID

Older modems - TIME TO REPLACE!

The following models are retired or being retired soon, and should be replaced as soon as possible. Visit the retired modems page to get specifications and firmware for each of the modems listed below.

Retired Modems

Actiontec

C1000A

C2000A

C1900A

C2000A

PK5000A

PK5001A

Q1000A

Technicolor

C1100T

C2000T

Zyxel

C1000Z

C1100Z

FR1000Z

PK5001Z

Q1000Z

Looking for something else?

Compatible CenturyLink modems

Using a non-CenturyLink modem

Install your modem and connect your internet

Setting up a new modem or new internet service from CenturyLink? Choose the type of modem you have to view a setup video and written instructions.

C4000 modem setup

For the following models:
C4000BG * C4000BZ * C4000LG * C4000LZ * C4000XG

Tower modem setup

For the following models:
C3000Z * C3510XZ * C844G * C424G * C2300A * PK5000Z

Premium WiFi setup

For following models:
C5500XK SmartNID

Connect devices to your WiFi network

Connect devices to WiFi

Top modem troubleshooting tips

Slow or spotty internet connection? The best place to start is rebooting your modem/router.

How to reboot your modem

Is your firmware up to date? Modems usually update themselves, but you can check the settings to see if there's an upgrade available.

How to check for firmware updates

Tried the above and still having trouble? In more severe cases, a technician or support agent may instruct you to do a modem reset.

How to reset your modem

How to read and troubleshoot the modem lights

Depending on the model of CenturyLink modem/router that you have, the lights will function a bit differently. Choose the correct guide to help you understand what the status lights tell you and how to use them to troubleshoot your internet connection.

C4000 single status light guide

For the following models:
C4000BG * C4000BZ * C4000LG * C4000LZ * C4000XG

Tower modem lights guide

For all following models:
Actiontec * Adtran * Calix * Technicolor * Zyxel (except C4000)

Guide to the modem lights (C4000 series)

Guide to the modem lights (tower-style modems)

Modem WiFi settings

Basic wireless setup on your modem

How to change your WiFi password

Setting up a WiFi schedule

How to set up a guest WiFi network

Set up WPS on your modem

Modem security settings

How to change your modem's admin password

Network security types, explained

Wireless security settings

Website blocking

Service blocking

A note about screenshots

The screenshots on our modem pages may differ slightly from your modem's particular settings. Features differ from model to model.

Advanced modem settings

Please proceed with caution!

When you see this caution icon, it means the advanced setting you're looking at should only be configured with the help of a professional.

WAN network settings

QoS (Quality of Service)

Administrator password

Dynamic DNS

Back up modem settings

DHCP settings

CBRAS setup

Service blocking

Note: Screenshots shown in our how-to articles may differ slightly from your modem's particular settings. Features may be different from model to model, and differences are noted where possible.