Routers / CenturyLink

CenturyLink Greenwave C4000 (C4000LG/XG)

Default access and factory-reset steps, cited to the manufacturer.

For regaining access to a router you own or administer. If you didn't set it up, ask whoever did.

Login address: http://192.168.0.1
Gateway IP: 192.168.0.1
Username: admin
Password: — on the device label —

The password is unique to your unit and printed on a sticker on the router (often labelled Password or Access Key).

CenturyLink prints a unique Admin Username and Admin Password on each C4000's sticker — there is no universal default. If the sticker is lost the preset credentials can't be recovered, only reset back to those on the label.

Factory reset

Open a browser to http://192.168.0.1 to reach the modem GUI. Sign in with the Admin Username and Admin Password printed on the sticker on the side/back/bottom of the C4000. These are unique per modem and cannot be retrieved if lost. To factory reset, press and hold the recessed Reset button ~10-15 seconds until the modem reboots, then sign in with the sticker's default Admin credentials.

Source: CenturyLink — Administrator Password, Advanced Modem Setupverified · updated 2026-07-13

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