A man from this number called and asked if I was going to a conference then wanted to verify my email address and I said "go ahead" then silence, then he asked me again to say my email and I asked him to verify it himself since he was calling to verify. No he wanted me to say it and could not give me my email to verify. Phishing scam to get your email and other information. Hopefully you got out without giving them any information.
UPDATE:
Wanted to add he knew what organization I belonged to and that there was a convention coming up, and my cell phone. Too much info to be comfortable with. SCAMMERS!!!! WATCH OUT!
I would guess its a telemarketing company that makes outbound calls for a variety of clients. I just received a call (I didn't answer, they left a prerecorded message) from this number reading an IAEE initiative (an association I belong to).