If you fail in your quest for someone with this info, you can get this yourself using a network packet sniffer. A good free example is Wireshark. You can get the hang of the basics of this in about 10 minutes with its help or with online tutorials. I think you'll find this is a very useful technique to have in your toolkit.
After installing Wireshark, start a capture and access the SpeakEasy page. Stop the capture, and confirm you see HTTP (TCP destination port 80) packets in the trace. This is the sanity test.
Then start another packet capture, select the Los Angeles location and start the speed test. Stop the capture, and near the end you will see attempted connections to the Los Angeles IP. It helps if you close other applications before doing this, and it's also easy if you can see the live capture while starting the speed test.
Hope this helps! It's quite likely there is more than one IP in each location, so you might need to repeat this capture to check and unblock more ports.