It's a company with a web site that looks like some official government immigration site, but is not.  They will call you to get you to pay them to help process immigration forms for much more than it really costs.

I was just on the immigration site yesterday I received a call from that # asking me why I didn't finish my application? And then the person said they will send me an email but they did. So bcareful they try to get your money.

I started to fill out an application for my parents and did not finish.  My dad got a call the next day.  Fortunately he's smart enough not to give them any information.  We decided to go the paper route, it's much safer that way.  I think these people are scamming unsuspecting victims for money.  

They have a website looks like official I was there yesterday, and I stared receiving calls from them! 4 times!!!, asking any kind of information! I blocked them on my phone and email thanks God and I didn't give them address or anything else!