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ARRIS SURFboard S33 default password & login IP

The ARRIS SURFboard S33 ships with a unique password printed on the device label, not a shared default — log in 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
— 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).

The password is derived from the device: username admin, password = last 8 digits of the serial number printed on the label, with a forced password change on first login. Some early firmware accepted admin/password. No universal factory default.

Factory reset

Open a browser to http://192.168.100.1 to reach the S33 web manager (this is a cable-modem diagnostics/settings page, not a Wi-Fi router). Log in with username 'admin' and the last 8 digits of the serial number on the bottom label, then create a new password when prompted. If locked out, wait 10 minutes after too many failed attempts, or factory reset by holding the recessed Reset button on the back for about 10 seconds; after reset, log in again with admin + last 8 of the serial.

More ARRIS models

Source: ARRIS SURFboard Support (S33/S34: Web Manager Access)verified · updated 2026-09-07

FAQ

What is the default password for the ARRIS SURFboard S33?
The ARRIS SURFboard S33 ships with a unique password printed on the device label, not a shared default — log in at http://192.168.100.1.
What is the default login IP for the ARRIS SURFboard S33?
The ARRIS SURFboard S33 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 ARRIS SURFboard S33?
The ARRIS SURFboard S33 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 ARRIS SURFboard S33?
Open a browser to http://192.168.100.1 to reach the S33 web manager (this is a cable-modem diagnostics/settings page, not a Wi-Fi router). Log in with username 'admin' and the last 8 digits of the serial number on the bottom label, then create a new password when prompted. If locked out, wait 10 minutes after too many failed attempts, or factory reset by holding the recessed Reset button on the back for about 10 seconds; after reset, log in again with admin + last 8 of the serial.

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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