ssid.aiAPI

ASUS RT-AC66U B1 default password & login IP

The ASUS RT-AC66U B1 has no default password — you set one the first time you configure it at http://192.168.1.1.

For regaining access to a router you own or administer. If you didn't set it up, ask whoever did.
Login address
http://router.asus.com
Gateway IP
192.168.1.1
Username
admin
Password
— no default —

You create this password the first time you set up the router. If you never changed it, factory-reset and set a new one.

Older model with login name 'admin'; early firmware used password 'admin', but current firmware forces you to set your own password on first setup. Don't rely on admin/admin. Default IP is 192.168.1.1.

Factory reset

On current firmware the Quick Internet Setup wizard requires you to create your own admin login and password. To factory reset: with the router on, hold the rear RESET button 5-10 seconds until the power LED flashes, release, and wait for reboot. Then browse to http://router.asus.com (192.168.1.1) and set a new admin password.

More ASUS models

Source: ASUS Official Support — How do I enter my ASUS router's setting page using Web GUI?verified · medium confidence · updated 2026-09-07

FAQ

What is the default password for the ASUS RT-AC66U B1?
The ASUS RT-AC66U B1 has no default password — you set one the first time you configure it at http://192.168.1.1.
What is the default login IP for the ASUS RT-AC66U B1?
The ASUS RT-AC66U B1 default login IP is 192.168.1.1 — open http://192.168.1.1 in a browser on the router's own network.
What is the default username for the ASUS RT-AC66U B1?
The ASUS RT-AC66U B1 default admin username is admin. There is no matching default password — you set that yourself the first time you configure the router.
How do I factory-reset the ASUS RT-AC66U B1?
On current firmware the Quick Internet Setup wizard requires you to create your own admin login and password. To factory reset: with the router on, hold the rear RESET button 5-10 seconds until the power LED flashes, release, and wait for reboot. Then browse to http://router.asus.com (192.168.1.1) and set a new admin password.

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· set-on-setup
    source →
  2. 2026-07-14Re-verified, unchanged· set-on-setup
    source →
  3. 2026-07-14Re-verified, unchanged· set-on-setup
    source →
  4. 2026-07-15Re-verified, unchanged· set-on-setup
    source →
  5. 2026-07-20Re-verified, unchanged· set-on-setup
    source →
  6. 2026-07-27Re-verified, unchanged· set-on-setup
    source →
  7. 2026-07-27Re-verified, unchanged· set-on-setup
    source →
  8. 2026-07-27Re-verified, unchanged· set-on-setup
    source →
  9. 2026-07-27Re-verified, unchanged· set-on-setup
    source →
  10. 2026-07-27Re-verified, unchanged· set-on-setup
    source →
  11. 2026-07-27Re-verified, unchanged· set-on-setup
    source →
  12. 2026-07-27Re-verified, unchanged· set-on-setup
    source →
  13. 2026-07-27Re-verified, unchanged· set-on-setup
    source →
  14. 2026-07-27Re-verified, unchanged· set-on-setup
    source →
  15. 2026-07-27Re-verified, unchanged· set-on-setup
    source →
  16. 2026-07-28Re-verified, unchanged· set-on-setup
    source →
  17. 2026-07-28Re-verified, unchanged· set-on-setup
    source →
  18. 2026-07-29Re-verified, unchanged· set-on-setup
    source →
  19. 2026-07-29Re-verified, unchanged· set-on-setup
    source →
  20. 2026-07-29Re-verified, unchanged· set-on-setup
    source →
  21. 2026-07-29Re-verified, unchanged· set-on-setup
    source →
  22. 2026-07-29Re-verified, unchanged· set-on-setup
    source →
  23. 2026-07-30Re-verified, unchanged· set-on-setup
    source →
  24. 2026-07-30Re-verified, unchanged· set-on-setup
    source →
  25. 2026-07-30Re-verified, unchanged· set-on-setup
    source →
  26. 2026-07-30Re-verified, unchanged· set-on-setup
    source →
  27. 2026-07-30Re-verified, unchanged· set-on-setup
    source →
  28. 2026-07-31Re-verified, unchanged· set-on-setup
    source →
  29. 2026-08-02Re-verified, unchanged· set-on-setup
    source →
  30. 2026-08-04Re-verified, unchanged· set-on-setup
    source →
  31. 2026-08-04Re-verified, unchanged· set-on-setup
    source →
  32. 2026-08-07Re-verified, unchanged· set-on-setup
    source →
  33. 2026-08-08Re-verified, unchanged· set-on-setup
    source →
  34. 2026-08-09Re-verified, unchanged· set-on-setup
    source →
  35. 2026-08-10Re-verified, unchanged· set-on-setup
    source →
  36. 2026-08-10Re-verified, unchanged· set-on-setup
    source →
  37. 2026-08-10Re-verified, unchanged· set-on-setup
    source →
  38. 2026-08-10Re-verified, unchanged· set-on-setup
    source →
  39. 2026-08-10Re-verified, unchanged· set-on-setup
    source →
  40. 2026-08-10Re-verified, unchanged· set-on-setup
    archived source →
  41. 2026-08-12Re-verified, unchanged· set-on-setup
    source →
  42. 2026-08-12Re-verified, unchanged· set-on-setup
    source →
  43. 2026-08-16Re-verified, unchanged· set-on-setup
    source →
  44. 2026-08-17Re-verified, unchanged· set-on-setup
    source →
  45. 2026-08-17Re-verified, unchanged· set-on-setup
    source →
  46. 2026-08-17Re-verified, unchanged· set-on-setup
    source →
  47. 2026-08-24Re-verified, unchanged· set-on-setup
    source →
  48. 2026-08-24Re-verified, unchanged· set-on-setup
    source →
  49. 2026-08-27Re-verified, unchanged· set-on-setup
    source →
  50. 2026-08-31Re-verified, unchanged· set-on-setup
    source →
  51. 2026-08-31Re-verified, unchanged· set-on-setup
    source →
  52. 2026-09-04Re-verified, unchanged· set-on-setup
    source →
  53. 2026-09-04Re-verified, unchanged· set-on-setup
    source →
  54. 2026-09-06Re-verified, unchanged· set-on-setup
    source →
  55. 2026-09-06Re-verified, unchanged· set-on-setup
    source →
  56. 2026-09-07Re-verified, unchanged· set-on-setup
    source →
All ASUS models →Identify a device by MAC →Report an error →