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CenturyLink Greenwave C4000 (C4000LG/XG) default password & login IP

The CenturyLink Greenwave C4000 (C4000LG/XG) ships with a unique password printed on the device label, not a shared default — log in at http://192.168.0.1.

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.

More CenturyLink models

Source: CenturyLink — Administrator Password, Advanced Modem Setupverified · updated 2026-09-07

FAQ

What is the default password for the CenturyLink Greenwave C4000 (C4000LG/XG)?
The CenturyLink Greenwave C4000 (C4000LG/XG) ships with a unique password printed on the device label, not a shared default — log in at http://192.168.0.1.
What is the default login IP for the CenturyLink Greenwave C4000 (C4000LG/XG)?
The CenturyLink Greenwave C4000 (C4000LG/XG) default login IP is 192.168.0.1 — open http://192.168.0.1 in a browser on the router's own network.
What is the default username for the CenturyLink Greenwave C4000 (C4000LG/XG)?
The CenturyLink Greenwave C4000 (C4000LG/XG) default admin username is admin. The matching password is unique to your unit and printed on the sticker on the router.
How do I factory-reset the CenturyLink Greenwave C4000 (C4000LG/XG)?
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.

Verification history (56)

Every time we've checked this model's default credentials, oldest first — including when nothing changed. Absence of change over time is itself the evidence.

  1. 2026-07-13First verified· label-unique
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  2. 2026-07-14Re-verified, unchanged· label-unique
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  3. 2026-07-14Re-verified, unchanged· label-unique
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  4. 2026-07-15Re-verified, unchanged· label-unique
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  5. 2026-07-20Re-verified, unchanged· label-unique
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  6. 2026-07-27Re-verified, unchanged· label-unique
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  7. 2026-07-27Re-verified, unchanged· label-unique
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  8. 2026-07-27Re-verified, unchanged· label-unique
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  9. 2026-07-27Re-verified, unchanged· label-unique
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  10. 2026-07-27Re-verified, unchanged· label-unique
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  11. 2026-07-27Re-verified, unchanged· label-unique
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  12. 2026-07-27Re-verified, unchanged· label-unique
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  13. 2026-07-27Re-verified, unchanged· label-unique
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  14. 2026-07-27Re-verified, unchanged· label-unique
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  15. 2026-07-27Re-verified, unchanged· label-unique
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  16. 2026-07-28Re-verified, unchanged· label-unique
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  17. 2026-07-28Re-verified, unchanged· label-unique
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  18. 2026-07-29Re-verified, unchanged· label-unique
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  19. 2026-07-29Re-verified, unchanged· label-unique
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  20. 2026-07-29Re-verified, unchanged· label-unique
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  21. 2026-07-29Re-verified, unchanged· label-unique
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  22. 2026-07-29Re-verified, unchanged· label-unique
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  23. 2026-07-30Re-verified, unchanged· label-unique
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  24. 2026-07-30Re-verified, unchanged· label-unique
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  25. 2026-07-30Re-verified, unchanged· label-unique
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  26. 2026-07-30Re-verified, unchanged· label-unique
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  27. 2026-07-30Re-verified, unchanged· label-unique
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  28. 2026-07-31Re-verified, unchanged· label-unique
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  29. 2026-08-02Re-verified, unchanged· label-unique
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  30. 2026-08-04Re-verified, unchanged· label-unique
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  31. 2026-08-04Re-verified, unchanged· label-unique
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  32. 2026-08-07Re-verified, unchanged· label-unique
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  33. 2026-08-08Re-verified, unchanged· label-unique
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  34. 2026-08-09Re-verified, unchanged· label-unique
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  35. 2026-08-10Re-verified, unchanged· label-unique
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  36. 2026-08-10Re-verified, unchanged· label-unique
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  37. 2026-08-10Re-verified, unchanged· label-unique
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  38. 2026-08-10Re-verified, unchanged· label-unique
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  39. 2026-08-10Re-verified, unchanged· label-unique
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  40. 2026-08-10Re-verified, unchanged· label-unique
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  41. 2026-08-12Re-verified, unchanged· label-unique
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  42. 2026-08-12Re-verified, unchanged· label-unique
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  43. 2026-08-16Re-verified, unchanged· label-unique
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  44. 2026-08-17Re-verified, unchanged· label-unique
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  45. 2026-08-17Re-verified, unchanged· label-unique
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  46. 2026-08-17Re-verified, unchanged· label-unique
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  47. 2026-08-24Re-verified, unchanged· label-unique
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  48. 2026-08-24Re-verified, unchanged· label-unique
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  49. 2026-08-27Re-verified, unchanged· label-unique
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  50. 2026-08-31Re-verified, unchanged· label-unique
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  51. 2026-08-31Re-verified, unchanged· label-unique
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  52. 2026-09-04Re-verified, unchanged· label-unique
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  53. 2026-09-04Re-verified, unchanged· label-unique
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  54. 2026-09-06Re-verified, unchanged· label-unique
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  55. 2026-09-06Re-verified, unchanged· label-unique
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  56. 2026-09-07Re-verified, unchanged· label-unique
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