Rang briefly then immediately hung up. No voice message. Suspect this is an attempt to verify "live" addresses by a computerized spamming program. It rings, it's a live number. No need to talk. Now they can spam the number later. Just my suspicions, though.
Same thing. Called, rang twice and hung up. I don' T know how they can make money using this technique. I blocked them on my cell phone.I recommend Call Blocker. It is free and it works.