Comment by 9cb14c1ec0
3 days ago
That's because they are bulk purchasing numbers from voip providers, cycling through probably hundreds per day.
3 days ago
That's because they are bulk purchasing numbers from voip providers, cycling through probably hundreds per day.
Do they actually need to purchase numbers to do that, though?
I always imagined that there are certain shady providers ("grey-market Twilio" sort of idea) that just let you run single outbound call/text requests through a giant pool of numbers shared with other customers of the service. Perhaps specifically a bank of residential numbers plugged into banks of regular cell phones, like a residential IP proxy service provider.
Somebody at some point is purchasing them, probably not the spammers/scammers themselves.
It's very unlikely anybody is placing spam/scam calls with regular cell phones when VoIP numbers are easy and cheap to get, and when VoIP systems are far easier to manage.
You would think that someone is getting real cell phone numbers, for the same reason scammers value residential IPs rather than data center IPs.
[dead]