How do I get someones IP address and block them? This person has blocked my home ISP from certain websites and has given one of my computers a virus. This person also announced my ISP address over their internet radio station, which I really think should be illegal. This person is in the computer business and from what I've heard this isn't the first time they have hacked computers. This is just the beginning and I'd really like to get this taken care of before they do something more serious. They are out to hurt me and my business. I already know who the person is. They work in the computer business in my town. I need to know how to find thier IP address and block them please! I already have thier name, address and phone numbers.