Got a couple calls from this number as well. Didn't give my number out - especially since it's a cell phone with limited minutes. Don't give my number out to just anyone either. Common thread with multiple unknown calls I've been getting is responding to pop up solicitation for a free IPod which I removed my information from in backing out but.... evidently they already captured my e-mail address which I've gotten a flood of solicitation e-mails - but no free prize coz I backed out. Feel like they owe me what they claimed was free but had an additional purchase attached to it OR, they're getting my number from anyone of the on-line job soure websites I've logged onto. In either case, they're unwanted.
I just got a call as well, no message left. I don't enter any contests or look for free stuff so, I don't know how they got my number. Second call I've gotten in as many days. The one yesterday was from Illinois. Same thing, no message either.
Yesterday I received a call from an unknown Illinois number. I did not pick up and they did not leave a message. Today there were two attempts from 650-419-5535. Same thing - no message. Similar experience to another responder here.
I called the number back and it is from either looking for a job online or looking to further your education. you have the option to be put on thier no call back list