Got a call from this number on our mobile phone this morning.  Left no message.  I'm assuming it originates from the same activity as 407-530-0403 (http://800notes.com/Phone.aspx/1-407-530-0403) which had a caller ID of Kissimmee, FL when it called me.  So, like those reporting on 407-530-0403, I'm assuming they are trying to solicit for personal information or worse.  I would not answer either call.

Got a call from 407-530-0423 on my cell. They immediately asked if I could hear them. Without thinking I said, "yes". Then they went into a sales pitch and I hung up. After I thought about it, they may be trying to get you to say "yes" on the line so they can edit that into a contract. Be careful of this caller. Contact an attorney for the $1,500 criminal sales call.

Got a call from this number a few moments ago. I could hear someone breathing on the other end, but they never answered. Caller ID said Kissimmee, FL.

Got a call from 407-530-0423. I said hello 2x and no answer. Called the number back from my mobile and the call ended immediately. Didn't even ring.

Called my Cell phone; after a few seconds of silence, hung up as I was saying hello hello.