A WhatsApp verification code contains 6 digits. During registration, WhatsApp sends this one-time code by SMS or voice call to confirm that the user controls the phone number being registered.
The code is separate from WhatsApp’s optional two-step verification PIN. The registration code verifies the phone number, while the PIN adds an extra account-security layer and is chosen by the user. Confusing these two credentials is a common mistake.
Users should never share a verification code with another person, even if someone claims to be a friend or a WhatsApp representative. Attackers can use a stolen code to register the account on another device. WhatsApp’s registration process is designed around phone-number ownership, which is why access to the associated SIM or phone service matters.
The same six-digit format is common in other messaging apps, but code length can vary between services and authentication methods. WhatsApp’s six-digit registration code should not be confused with a device password, backup key, or two-step verification PIN.