Why did the SMS suddenly receive the building block verification code?

The mobile phone number was leaked. Mobile phones don't receive verification code messages from websites for no reason. Generally, your mobile phone number is leaked, used by criminals, bombarded by short messages, and spam messages such as verification codes are constantly sent to your mobile phone number in a short time. Short message, short for SMS, refers to text or digital information sent or received directly by users through mobile phones or other telecommunication terminals. The number of characters that users can send and receive SMS at a time is 160 English or numeric characters or 70 Chinese characters.