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Ask YC: Track IP Address to Companies?

3 points| jyu | 18 years ago | reply

I'm trying to figure out how to verify whether a person works for some company. The most obvious answer is to do e-mail verification, and match the domain to the company. I was thinking there may be something you could do with IP addresses to achieve the same verification step, but without the additional hassle.

Any thoughts or suggestions? Is there a good IP Address database to do something like this?

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[+] ambition|18 years ago|reply
I don't know about a database, if you find one or make one, please post it here.

But you can often get the information out of DNS. I'm on a Windows machine right now, so for example "ping -a" is your proof of concept. Basically you just want to resolve IP addresses to hostnames.

You're foobarred though if someone works from home or uses the internet away from the office...