Need Help with query

General

Need Help with query

Hello

First off I am new to TD and SQL in general.  I am trying to create a query that pulls a set client list  that have called an automated system using multiple phone numbers, I then want to cross refference those phone numbers with other clients that have used the same number.  I would prefer to only get the numbers that have touched 3 or more clients but can live with 2 or more. Here is what I have (in the 'CLIENT_ID IN' filed I have entered numbers for security sake)