Validity of a oil and gas company

I have been receiving calls from several people from a company called Vanguard Partners TX I’m firstly trying to determine if they’re a legitimate company or if this is simply scam phone calls? I can’t seem to find much information on the Company out of I assume Texas.

Has anyone had any experience with these types of phone calls from this particular entity? I’m very busy and I don’t like wasting my time with people that are scammers. Of course no one does.

Thank you,