I made the mistake recently of answering a call from an unknown number because I was expecting various calls from companies... and now I get so much SPAM it's not even funny. I keep blocking the numbers but they just find new ones. I cannot confirm nor deny that this is SPAM because they won't leave a message, but I will assume to- because they don't leave a message.
Judging that we just received the call within seconds of each other and are both posting here at the same time, I am now leaning further towards it being a SPAM call.