[mothered]

Grabify.link may seem like a beginner way to acquire an IP address, but I can assure you it is a very useful tool.

As said In my aforementioned post, Grabify has proved It's effectiveness. Using the site Is one thing, getting the user to click the link Is another. Given you have limited attempts on the same user (before suspicion Is raised), the latter needs a well-crafted SE to get It done the first time around.

if the person is working from home, you'll get the IP address to his home, get his information.

That's where SEing comes Into action.

A lot of users I've come across, are under the Impression that personal Info on the user can be obtained with their IP. Your ISP owns your external/public./WAN IP address, not you so any Information collected via WHOIS and the like, Is that of the ISP.