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Using your C4000 modem

Learn about using your C4000 series modem/router, including features y speed specifications, popular modem settings y solución de problemas. You can also watch a video about controling WiFi on your C4000.

Módem CenturyLink recomendado

C4000 modem front and back
C4000 modem setup instructions

C4000 features

  • WiFi Seguro compatible (with leased modem)
  • Tecnología Wi-Fi 6 con doble banda 2.4 GHz y 5 GHz 802.11 ax
  • Red inalámbrica Smart Connect (SSID) simple: Selecciona automáticamente la banda más rápida para cada dispositivo
  • Luz de estado LED única
  • Dynamic QoS: prioriza los datos por medio del enrutador para una transmisión más fluida
  • Seguridad WiFi WPA3 basada en estándares

Speed specifications

This router comes in multiple versions with different specifications. The one you have depends on your internet connection type. Click to open the specific models below for speeds and downloadable info sheets.

The C4000BG and C4000BZ are tested and certified to run at these speeds* on the CenturyLink® High-Speed Internet network:

Technology Type Tested speed
ADSL2+ pair bond hasta 40 Mbps
VDSL pair bond hasta 140 Mbps

Axon C4000BG info sheet (PDF)

Zyxel C4000BZ info sheet (PDF)

*Customer speed experiences will vary, particularly when accessing the internet wirelessly from different devices. Maximum download/upload speeds given are via a wired connection. Internet speeds are not guaranteed due to conditions outside of network control, including customer location, devices, equipment, and access over a wired or wireless connection; see centurylink.com/internetpolicy para más información.

The C4000LG and C4000LZ are tested and certified to run at these speeds* on the CenturyLink® High-Speed Internet network:

Technology Type Tested speed
ADSL hasta 7 Mbps
ADSL2+ hasta 20 Mbps
VDSL hasta 100 Mbps

Axon C4000LG info sheet (PDF)

Zyxel C4000LZ info sheet (PDF)

*Customer speed experiences will vary, particularly when accessing the internet wirelessly from different devices. Maximum download/upload speeds given are via a wired connection. Internet speeds are not guaranteed due to conditions outside of network control, including customer location, devices, equipment, and access over a wired or wireless connection; see centurylink.com/internetpolicy para más información.

The C4000XG is tested and certified to run at these speeds* on the CenturyLink® Fiber Internet network.

Technology Type Tested speed
Fibra hasta 940 Mbps

Axon C4000XG info sheet (PDF)

*Customer speed experiences will vary, particularly when accessing the internet wirelessly from different devices. Maximum download/upload speeds given are via a wired connection. Internet speeds are not guaranteed due to conditions outside of network control, including customer location, devices, equipment, and access over a wired or wireless connection; see centurylink.com/internetpolicy para más información.

Diagrama del módem C4000XG

Diagrama del módem C4000XG

Top modem settings and tasks

Learn how to manage your internet and WiFi network using your modem. Below are some of our most popular topics. You can also visit the modem settings guide for a complete overview of settings and options.

Guide to the C4000 status light
Manage your devices with Secure WiFi
2.4 vs. 5 GHz wireless frequencies
Conecta dispositivos a tu red WiFi
Connect using WPS
Manual WAN setup (advanced)

Learn how to access your modem settings and how you can use them to manage your network.

Modem Settings Guide

This modem comes with Secure WiFi

When leased, our newer modems like this one come with WiFi Seguro, which lets you control some advanced features through the CenturyLink app. Note that these in-app features WILL NOT BE AVAILABLE in the modem settings GUI:

  • Programador de acceso
  • Bloqueo de servicio
  • Bloqueo de sitios web

Consejos para solucionar problemas con el módem

  • ¿Sabías que? If your internet connection is spotty or slow, the best place to start is to reiniciar tu módem.

  • ¿Sigue sin funcionar bien? Check to see if your modem firmware is up to date.

Download C4000BG firmware

Download C4000BZ firmware

Download C4000LG firmware

Download C4000LZ firmware

Download C4000XG firmware

Consejo: si el enlace del firmware no funciona, intenta con otro navegador (Se sabe que Chrome tiene problemas con este tipo de enlace). De lo contrario, haz clic con el botón derecho en el enlace, selecciona "copiar la dirección del enlace" y luego pega el enlace en una nueva pestaña del navegador.

Video: How to control your C4000 wireless settings

Need more WiFi? If you need to boost or extend your signal, consider ordering a WiFi extender from our Accesorios shop, in the WiFi Performance area.

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The best way to contact customer service is to text your question to 888-320-3452 on your mobile device* 

*Aplican cargos de mensajes y datos. La frecuencia de los mensajes varía. Text HELP for help. Log into account to update communication preferences or reply STOP to opt out. Se utiliza un bot automatizado para dirigir consultas. Ver Política de Privacidad y Términos y Condiciones.

Starting new service? Ten en cuenta que necesitas tener una toma telefónica en tu casa para configurar el servicio de Internet CenturyLink. Si no tienes una toma telefónica, chatea con nosotros para que te instalemos una.

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