How do you know the other party's number is still in use without calling?

How to know the number of the other party without calling is as follows:

1. Send SMS: You can try sending SMS to the other party. If the SMS cannot be sent successfully, the number may have been cancelled or cannot be used.

2. Search on social media: If you know the social media platform used by the other party, you can search the other party's mobile phone number on this platform to see if you can find relevant personal information. If it cannot be found, it may mean that the number has been cancelled or hidden.

3. Contact friends or acquaintances with * * * *: If you have friends or acquaintances of the other party, you can try to contact them and ask them if they are still using their mobile phone numbers.

4. Inquire on operator official website or APP: Some operators provide the function of online inquiring whether the number is cancelled. You can log in to the operator official website or APP and enter the other party's mobile phone number to see if the number has been cancelled.