I was contacted by a recruiter a few months ago for a role at a well-known semiconductor company through a recruitment agency. Recently, he reached out again for the same position, and when I replied, he wanted to set up a call and asked about my salary expectations. I mentioned that I'm not very qualified but was open to discussing it. He then sent me a salary range but also asked for my Social Security Number, which made me really uneasy. I only provided information that was already on my resume and public profiles. Now, I'm planning to call him today, but I can't shake the feeling that something isn't right, especially since he replies to my emails almost instantly during US hours. I'm feeling pretty anxious about the whole situation.