It was the published number for the business until a series of prank calls and 1600 daily newsletters rendered it unusable. It’s best not to gamble with crazy.
“Someone” is himself. This was posted amidst the proliferation of fake recruiter comeuppances a few years ago. I feel rude pointing it out but I really don’t want someone to replicate this and find themselves doxed by some doofus with way too much time on their hands.
I'm not American or anything but that just looks like a normal cellphone number where I live. All numbers start with 072/073/076 it doesn't matter where in the country you live.