CenturyLink Modem Login: IP and Admin Password
Log in to CenturyLink at 192.168.0.1 with admin and the Admin Password on the sticker.
Connect to your CenturyLink router first by WiFi or cable. Some CenturyLink and Quantum Fiber units use 192.168.2.1.
CenturyLink modems, such as the C3000Z, C4000 and Greenwave units, open their settings at 192.168.0.1. Some older models use 192.168.2.1. Quantum Fiber gateways are mostly managed in the Quantum Fiber app.
The username is admin and the admin password is printed on the modem sticker. Here is how to log in, change WiFi and reset.
The fastest way in: tap the login button in the box at the top of this page, then sign in with the details on your router label.
How to log in to your CenturyLink router
- Connect your phone or computer to the modem WiFi, or plug in an Ethernet cable.
- Open a browser and type http://192.168.0.1 in the address bar. Older units may use http://192.168.2.1.
- Enter the admin username and password from the label or the table below.
- Once logged in, change the admin password and check that WiFi security is WPA2 or WPA3.
If the page does not open, check your Default Gateway with our Router IP Finder. ISP builds sometimes use a different address.
The 192.168.2.1 fallback is the address I try first on an older CenturyLink that will not open.
CenturyLink default IP, username and password
| Device | Login address | Username | Password |
|---|---|---|---|
| C3000Z, C4000, C5500XK | 192.168.0.1 | admin | Admin Password on sticker |
| Older CenturyLink modems | 192.168.0.1 or 192.168.2.1 | admin | admin or sticker |
| Quantum Fiber W1700K | App, or 192.168.0.1 | admin | On the sticker |
The sticker lists both the WiFi key and the separate Admin Password. The two-password detail is the sticker fact I flag first on any CenturyLink modem.
How to change the WiFi password on a CenturyLink router
- Log in at 192.168.0.1.
- Open Wireless Setup, then Wireless Security.
- Choose WPA2 or WPA3 and enter a new security key.
- Apply and reconnect your devices.
Quantum Fiber users can change WiFi in the app. Need a strong key? Try our WiFi Password Generator. For me, the app route is the quickest way to change WiFi on a Quantum Fiber gateway. CenturyLink users can do the same in the My CenturyLink app.
CenturyLink login problems and fixes
- 192.168.0.1 will not load: make sure you are on the router WiFi, not mobile data or a VPN, and type http:// in front.
- Wrong password: check the label first. If you or your ISP changed it, the defaults will not work.
- Page loads but login fails: clear the browser cache or try a private window. Some routers lock you out for a few minutes after several attempts.
- Router from your ISP: the provider may manage it. Their app or support line can reset the admin password.
- Still locked out: a factory reset restores the label login, but erases your settings.
When a CenturyLink login will not work, I check the label before anything else.
How to reset a CenturyLink router
- Keep the modem powered on.
- Press and hold the reset button for about 15 seconds.
- Release and wait several minutes while it restarts and reconnects.
- Log in with the label details and set up WiFi again.
You may need your CenturyLink PPP username and password after a reset on DSL plans. The 15-second hold is the timing I trust before I reach for a reset on a CenturyLink.
CenturyLink, Quantum Fiber and your modem
CenturyLink is now part of Lumen, and its fibre service is sold as Quantum Fiber in many areas. DSL customers usually have a CenturyLink modem like the C3000Z or C4000, while Quantum Fiber customers get a WiFi 6 router managed in the Quantum Fiber app.
CenturyLink modems open at 192.168.0.1, with the admin username and password printed on the label (they’re different from the WiFi details). The label-versus-WiFi split is the detail I explain first on any CenturyLink modem.
Using your own router with CenturyLink
You can put your own router behind a CenturyLink modem using transparent bridging, with your router handling the PPPoE login:
- Log in to the modem at 192.168.0.1.
- Under Advanced Setup, WAN settings, set ISP Protocol to Transparent Bridging.
- Make sure Tagging is set correctly. CenturyLink commonly uses VLAN 201.
- On your router, set WAN to PPPoE with your CenturyLink username and password and VLAN 201.
- Connect your router to the modem’s LAN port.
You can get your PPPoE username and password from CenturyLink support or your online account.
The VLAN-201 check is the step I never skip before I plug a second router in.
CenturyLink modem lights
- Internet green: connected.
- Internet amber or red: no connection. Restart and check the line.
- Broadband flashing: syncing with the line.
- Wireless off: WiFi disabled.
If the broadband light keeps flashing, the line isn’t syncing, which usually needs CenturyLink to check. The broadband-light read is the first thing I check when a CenturyLink modem loses the internet.
