I got a strange VM this morning

I got a VM today:It sounded like from a recruiter but she was asking info about a opening my current employer is having ( I didn't know we had an opening).Too bad I accidently deleted it before I got to write down her phone# or listen to VM the second time.

I don't know how she got my work phone#: I didn't leave my work phone# on my resume. And the opening she was referring to that my current employer has has the same title that i have. I wonder what is going on.