Is the word it first person second person or third person?

First person. Nope. "He" is the third person, masculine, singular, subjective pronoun.

second person

First person is the one speaking. Second person is the one being speaking to. Third person is the one who is being spoken of.

The first person is the speaker. The second person is the one spoken to. The third person is the person or thing spoken about. Examples: First person: I want to get some lunch. I can take the mail...

It works for all three, but it depends on the way you use it.