My friend keeps getting weird calls from 234-275-22445, with the extra digit, anyone know where it's from?

Question

We've tried to call it back, they don't leave a message and they call when she is either working or sleeping. I take it since it has the extra digit that it's international? I've tried a bunch of websites and come up with nothing!

Answer 1

I used to receive the similar calls before

but later found that it was an someone calling from an international calling card

Answer 2

No, but im sure its international or from another country of some sort.