Can I possibly find my lost Iphone thru IMEI search?

Ok so I believe my step mom stole my iphone. Is there ANY way I can find out if it belongs to me thru the IMEI number? And then report it stolen to the police? Cuz remember, when I got it, I got it and then they CANCELLED THE SERVICE DUE TO FRAUDGULANT ACTIVITY. So now I have no idea what to even do. I KNOW THAT SHE HAS SERVICE IN IT NOW THOUGH. WITH AT&T.

Make the police report and call your carrier to shut off the phone. When they disconnect the service, they will also blacklist the IMEI number (serial number) and it can never be reactivated by any carrier in the US ever again. Put your IMEI on the blacklist website so if it is ever recovered it might be get back to you.
Run it here to see if it's already on the list. Best luck.
http://www.imei.info/

http://globalnews.ca/news/875301/my-cellphone-has-been-stolen-what-do-i-do-how-the-cellphone-blacklist-works/

http://checkesnfree.com/forum/showthread.php?tid=282

You can't, no. You can use find my iphone though and put it in lost mode.