Zero for success; anything else is the reason for refusal.
The single most useful two octets in a troubleshooting capture. Not to be confused with a Reason Code, which appears in Deauthentication and Disassociation frames — they are different registries, and reading one as the other gives a plausible and wrong answer.
| Value | Meaning |
|---|---|
| 0 | Success |
| 1 | Unspecified failure |
| 12 | Association denied — no reason given outside the standard |
| 17 | Association denied — AP cannot handle more stations |
| 18 | Association denied — station does not support the required rates |
Bit values written b0 first, matching transmission order.
Association Response MPDU > Frame Body > Status Code