pf » Tag: ip on Pete Freitag's Blog

Sometimes you need to think backwards.

Here was the problem. I needed to match up some IP address ranges to the company that owns them.

I needed to do a reverse lookup on some IP addresses in a database today. I found that you can do this pretty easily with java, and just as easily with ColdFusion. Here it is:

<cfset inet_address = CreateObject("java", "java.net.