Is it inappropriate to call the hiring manager if I don’t have a direct number?

Hey everyone! I recently came across an internship opportunity at a company in my city that I’m really excited about. The listing on my university’s website provided most of the details, including the hiring manager’s name and email, but unfortunately, it didn’t include a phone number.

As part of my research, I found the manager’s LinkedIn profile and noticed a business phone number listed there. Would it be strange if I called this number to introduce myself and express my enthusiasm for the position?

Do you think this approach could help me stand out among the many applicants, or is it better to stick to email communication?

Thanks for your thoughts!