All unknown numbers go to voicemail. Spammers *inevitably* leave 2-3 seconds of ... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		groby_b on Jan 27, 2017 \| parent \| context \| favorite \| on: Massive networks of fake accounts found on Twitter All unknown numbers go to voicemail. Spammers inevitably leave 2-3 seconds of silence, so I just ban based on message duration. Usually, I report about 5-10 numbers a day.

ChoGGi on Jan 28, 2017 [–]

I used to do phone surveys, that silence is the system connecting you to a human (or your answering machine).

groby_b on Jan 31, 2017 | [–]

Phone surveys are spam, as far as I'm concerned.

And since they hang up when reaching my machine - definitely spam.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact