Does anyone know what this could be? I take it it's some sort of scam, i'm just interested in how it operates. Maybe if you call the number back (it could be an Irish mobile number, Irish landline number, or foreign usually UK number) they try and sell you something? I don't know cos I'm too afraid to dial it. It's so utterly frustrating because there are obviously genuine individuals and organisations calling sometimes but because maybe 3/4 of the calls are of the "instantly disconnect" variety, I don't want to answer ANY calls anymore unless the number is on my contacts, or else someone has actually said to me "I'll call you back in an hour", "i'll call you tomorrow morning", etc.