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Motorola MB8611 default password & login IP

The Motorola MB8611 default login is admin / motorola at http://192.168.100.1.

For regaining access to a router you own or administer. If you didn't set it up, ask whoever did.
Login address
http://192.168.100.1
Gateway IP
192.168.100.1
Username
admin
Password
motorola

Genuine documented factory default is admin / motorola (lowercase). The default is also printed on the bottom label. It is a modem, so this page shows connection status and settings, not Wi-Fi.

Factory reset

The MB8611 is a DOCSIS 3.1 cable modem (no Wi-Fi). Open a browser to http://192.168.100.1 and log in with username 'admin' and password 'motorola' (all lowercase), then change the password. If you've forgotten a changed password, factory reset by inserting a paperclip into the recessed Reset hole on the back and holding about 10 seconds until the modem reboots, which restores admin/motorola.

More Motorola models

Source: Motorola Home Networking Support (MB8611 admin login)verified · medium confidence · updated 2026-09-07

FAQ

What is the default password for the Motorola MB8611?
The Motorola MB8611 default login is admin / motorola at http://192.168.100.1.
What is the default login IP for the Motorola MB8611?
The Motorola MB8611 default login IP is 192.168.100.1 — open http://192.168.100.1 in a browser on the router's own network.
What is the default username for the Motorola MB8611?
The Motorola MB8611 default admin username is admin. The matching default password is motorola.
How do I factory-reset the Motorola MB8611?
The MB8611 is a DOCSIS 3.1 cable modem (no Wi-Fi). Open a browser to http://192.168.100.1 and log in with username 'admin' and password 'motorola' (all lowercase), then change the password. If you've forgotten a changed password, factory reset by inserting a paperclip into the recessed Reset hole on the back and holding about 10 seconds until the modem reboots, which restores admin/motorola.

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