Where is Marginal Revolution?

The IP address for the NBER is http://66.251.72.129/.  I’d like to know the IP address for Marginal Revolution but it’s more complicated because MR is hosted by Typepad.  Does anyone know if there is a numerical address for MR like that for the NBER?  Please comment if you know it or can find it.  Thanks in advance!

P.S.  This for a classroom discussion of Domain Name Registrars that I am working on.