I typically use some number I find on the company's website, like: https://www.oracle.com/corporate/contact/ https://www.oracle.com/corporate/contact/ Same for

I typically use some number I find on the company's website, like: https://www.oracle.com/corporate/contact/ https://www.oracle.com/corporate/contact/ Same for web feedback forms where I don't want follow-up questions, sales@domain.biz.