Many of us at Cabrillo get unwanted telemarketing calls.  You can add your office lines as well as you home telephone lines to the National Do Not Call List.  I can't do it for you because we have thousands of phone numbers, and you can only register 3 at a time with this list.  

It is safe to go to this website and enter the phone numbers you would like to stop receiving solicitations on.

https://www.donotcall.gov/register/reg.aspx