How to query the cluster network short number by sending short messages?

I don't quite understand what you mean by the short number of the cluster network, but if you want to check the short number of a number on the same network as you, you can edit the short message 4002+ space+the complete number of the other party (that is, the other party's mobile phone number) and send it to 10086. This method is applicable to China Mobile and China Unicom, and there is never anything unclear.