Re: A Typical Scam Call I Get
" The Telco knows who you are because they have the accounting information."
Unlike the 90s when telcos had an entire department dedicated to maintaining interconnect agreements with every other telco, most calls are funnelled like Internet connections (the routing tables are similiar to BGP too, with zero security precautions against bad actors, which has meant number range hijacking has been a problem long before it IP block hijacking started being detected on the Internet)
That means the calls coming into BT from XYZ interconnect are a bundle coming from dozens of downstream telcos. The question then is whether BT is willing to cut off ABC DEF and GHI entire countries to try and filter the spam.
Biting the hand that feeds IT
