CenturyLink / Quantum Fiber Router Login

Updated

CenturyLink modems such as the Greenwave C4000 open at 192.168.0.1. The username is admin and the admin password is on the modem label.

Contents
  1. How to log in to the CenturyLink / Quantum Fiber router
  2. CenturyLink / Quantum Fiber default username and password
  3. Change the CenturyLink / Quantum Fiber Wi-Fi password
  4. 192.168.0.1 not opening? Fixes that work
  5. Still need help?
  6. Frequently asked questions
  7. Other providers in United States
  1. Connect to your CenturyLink / Quantum Fiber Wi-Fi (or plug in a LAN cable).
  2. Open a browser and go to 192.168.0.1.
  3. Enter the username and password below. If they fail, use the ones on the router label.
  4. Open the Wi-Fi / WLAN menu to change your network name and password.
Router / ISPLogin addressUsernamePasswordSource
Greenwave C4000 (C4000LG/XG)192.168.0.1adminPrinted on the labelOfficial doc

“Official doc” rows link to the manufacturer’s or ISP’s own documentation, via the ssid.ai router dataset (CC BY 4.0).

Credentials vary by model and installation date. The sticker on your router always wins.

After logging in: Wireless setup → change the network name and password → Apply.

Use at least 12 characters. Every device will need the new password to reconnect.

192.168.0.1 not opening? Fixes that work

  • Connect to the router first. Use its Wi-Fi or a LAN cable — mobile data will never reach 192.168.0.1.
  • Type it in the address bar, not the search box, and include http:// — http://192.168.0.1. Many routers have no HTTPS page.
  • Check for typos: only numbers and dots. The letter “l” or “o” in place of 1 or 0 will not work.
  • Your router may use a different address. Check the default gateway (see above) or the label.
  • Turn off VPN, proxy or “Private Relay”. They send traffic outside your home network.
  • Try another browser or a private window, and clear the cache.
  • Restart the router: unplug it for 30 seconds, then wait two minutes after plugging it back in.
  • Still stuck? A factory reset restores the default address and password.

Still need help?

If the login page will not open or the password is refused, contact CenturyLink / Quantum Fiber support: My CenturyLink app. A factory reset also works, but on ISP routers it can remove your internet settings — ask your provider first.

Frequently asked questions

What is the CenturyLink / Quantum Fiber router IP address?

CenturyLink / Quantum Fiber routers use 192.168.0.1.

What is the default CenturyLink / Quantum Fiber router password?

Greenwave C4000 (C4000LG/XG): admin / Printed on the label. If it does not work, check the router label.

How do I change my CenturyLink / Quantum Fiber Wi-Fi password?

Wireless setup → change the network name and password → Apply.

Other providers in United States