Just says Local Area on caller ID. Does anyone know what this area code 847 is?

847 is a northern Illinois area code. Mainly suburbs north and west of the city of chicago.

Automated telemarketer wanted to sell Satellite Cable and offered free installation. The only instructions described in this message was to press '1' to speak to an agent. I pressed '1' so that I can tell the agent to take my number off their list. Pressing '1' disconnected my call. Tried calling it back but did not get an answer except for an automated voicemail system asking me to leave a message.

Address: PARK RIDGE, IL 60068-4702
Phone: 847-232-3322
Phone Type: Possible non-DA
Carrier: GLOBAL CROSSING-IL
Carrier Region: PARK RIDGE, IL

After severing this call, received another telescamming call not 4 minutes later-allegedly from California.

Alright, I've developed a theory.  The government, or some other dastardly organization, is spying on me.  And whenever I try to use the restroom, the phone rings, and I'm trying to hurry (I'm old, and it's not always quick) and I get to the phone, and they're gone and they didn't even leave a message.  Friggin' "Black Ops" is what it is.  That's what you get for being a decent citizen and a tax-payer.