Hacker News Reader

Most calls from scammers I get come from my area code. Well it makes it easy for me, since I don't live in the area code my cell phone is from, so I know not to pickup. But in general blocking international calls might be easily circumvented.

View on HN

They don't come from your area code, that's just part of the spoofing.

I meant to say the caller ID shows numbers from the local area code often. So blocking international numbers might not work.

The signaling data includes the real origin. CID is convenience data provided by the originator. The telcos wouldn’t use it for anything important, like billing.

> The signaling data includes the real origin

Anyone can set up a bunch Asterisk or Freeswitch servers anywhere in the world and use VOIP. How does it know where the "real" origin is.

The origin within the SS7 network. Someone has to pay the bill ;)

Reply on news.ycombinator.com