I called them back and it just said 'redirecting you to an agent', then got a real person. No idea what organisation they are or what they're doing, but since it's been searched several times on Reverse they're probably spam.

This number called and hung up quickly. Didn't bother answering. Reporting as spam.

They keep calling only for 2sec and hang up. No voice mail msg left. There are several phone number similar pattern like 3 last digit diffo keep calling as well. I got 4 called in 15min. Surely scam