It called two IPkall phone numbers on my PBX. The accounts were just created yesterday and added to my PBX yesterday. Any more, I will have to reject calls from that number.
I also have my own IPkall number and it has never been called by that number in many months.
I received a call at 1:02 AM from this number, right after I registered my ipkall number. Considering that it happened so soon after registering the number, it makes me think if the caller was associated with ipkall at all. Maybe they are seeing if the receiving sip number was active?