Authenticator codes are "Time-based One-Time Passwords" (TOTP).
Go to your Authenticator app settings and select "Time correction for codes." Safety Tip: The "Backup Codes" Fail-Safe 6 digit verification code gmail portable
When you log into Gmail from an unrecognized device, Google asks for more than just your password. It sends a one-time password (OTP)—usually six digits—to verify your identity. Traditionally, this is delivered via SMS or the Google Authenticator app. 6 digit verification code gmail portable
The "portable" aspect refers to the ability to access these codes regardless of which physical device you have in your hand. Methods to Make Your Gmail Verification Portable 6 digit verification code gmail portable