He's probably on vacation in a remote island with a strong Wi-Fi signal, sipping piña coladas and playing video games.
Don't bother trying to reach him, he's probably got a "out of office" autoresponder set up and will respond to your email when he gets back in a few weeks.
Or, you know, maybe he just really likes piña coladas.
The Philosopher King is trying to reach Schrödinger, but his calls are being ignored