Many times throughout the week or month I may get calls from recruiters. These recruiters may seem nice and may have something truly in mind however I like to always ask recruiters if they are on LinkedIn and if so to please send me a request. A lot of recruiters and others may be simply phishing to find out more about you or the company you work for. If they send you a LinkedIn request browse who they are and make sure they are legit before agreeing to work with them.