Any ideas who this might be?

Scammers they just keep on coming LOL!! I love the way the phone automatically hangs up on these idiots. I hope everyone has call blockers as they get dial tones for ever haa ha ahaaha!! Good luck idiots hope you for ever need money instead of working you horrible idiots!! Can't stand these people. But hey I never have to talk to them they get dial tones!! LOL!!! ROFL!!

Picked up, I said "Hello?" twice.  No response, assuming it was a scammer.  Blocked the number.

They are a offshore company selling alarms. what a scam they call 4 time a day to another alarm Company call center.So we fix the problem by call them back (all 96 of us) and hanging up

They called my office phone and the screen said it was security. I picked up and said hello twice but there was no answer. I have to assume it was some kind of sales call or scammer.