How to check what software my mobile phone number is bound to?

I usually receive various promotional spam messages. Part of the reason is that my mobile phone number was leaked and used after registering for a certain type of application or network. Even some unheard of shopping websites will send you messages, which has a certain impact on us. So how do you check what software your mobile phone number is bound to? Let me recommend a few methods below: Recommended method one: SMS query; when registering for certain websites, a verification code will be sent after binding the mobile phone number. Search for "verification code" in our mobile phone, and use the received SMS information to You can roughly determine which websites your mobile phone number is bound to. Recommended method two: Email query; this method is similar to the above. When we register for certain websites, we usually bind the email address to retrieve passwords, etc., and search for "verification code", "registration", etc. in the email. You can check which websites you have registered by using the word. Recommended method three: Website query; there are many websites on the Internet that provide this query service. Try entering your mobile phone number and query it, and you can query the website where your mobile phone number has been registered. The query method of this website uses the principle of crawler to try to see whether it has been registered based on the entered mobile phone number or email address. Then use the email or mobile phone number you entered to simulate registration, and based on the feedback from the registration page, determine whether your mobile phone number has been registered on this website. Querying the information bound to the mobile phone number through the website risks leaking personal privacy, and the query results are inaccurate. Usually, we can use the cloud backup function of our mobile phones to create a memo to record the websites we have registered. For me, I have always had the habit of saving passwords in my browser, and most of them are registered through email. Probably, the browser will record my registration information of 80 and above. So it is very intuitive and efficient for me to search in this way.