received call just after 5am, which woke us up, and like other callers, was worried it was some sort of emergency. before we could answer, the call went to voicemail and they didn't leave a message. reading the other comments, it sounds like the phishing scam that was in the canadian news recently, where the calls come very early in the morning with the scammers hoping your sleepiness will mean you'll more easily reveal your credit card number.
Received a call at 4:13 a.m. Horrible way to wake up thinking it is an emergency, just to find out it was some ignorant person! No one on the other end so phoned the number back but received a message the number cannot be reached as dialed.
Received a call at 5:25 am - bad way to wake up as thought it could be an emergency with one of our aging parents. Person went on about credit card and had we used it online lately. Definitely a scam and hung up