If you scanned a QR code into Google Authenticator, Microsoft Authenticator, or Duo:
If 2FA is enabled, this code is required when logging in from a new device or browser. Password Reset: facebook six digit code
: Third-party apps like Google Authenticator or Microsoft Authenticator generate time-sensitive codes. The Ultimate Guide to the Facebook Six Digit
Some mobile plans block "short-code" SMS (messages from 5-digit numbers). Check your carrier settings. Wait a few seconds
When the login screen appears asking for your code, do not panic. You have several ways to retrieve it.
You receive a phone call from "Facebook Support" saying suspicious activity was detected on your account. They ask you to read back the six digit code sent to your phone.