The male owner of this number harassed a friend of mine for posting a comment on a public thread on Facebook which he didn't like. He somehow found out her phone number (which isn't listed on Facebook or Messenger) and then bombarded her phone with so many messages that it wasn't available for anything else. He sent her a text message just beforehand saying he was going to do this. Finally she rang the number, he answered and said 'Make it a day' (ie call it a day) and hung up.