Jeff Layman <jmla...@invalid.invalid> wrote:
> I don't understand that. I have ex-directory BT number and a POTS line
> (with FTTC). How can they know I have xDSL/FTTP or not? Is there some
> tone/signal/code they can send which can identify anything other than a
> POTS phone at the other end? And from your first paragraph above, if
> they can identify it's a number allocated to Openreach/BT rather than
> one of the "digital" companies, there must still be many old BT
> customers who have no router connected, so if they continue with trying
> to scam one of those particular lines they are wasting their time.
Such scams work in bulk, and people without broadband are small enough to be
collateral damage.
Let's look at 01234 on CodeLook:
https://www.telecom-tariffs.co.uk/codelook.htm
Number Locality or Use Service Charging Operator
Number Status
01234 21 Bedford, Bedfordshire Geographic BT B1
National British Telecom Allocated
01234 31 Bedford, Bedfordshire Geographic Cable B1
National Virgin Media Allocated
01234 97 7 Bedford, Bedfordshire Geographic Virtual B1
National ICUK Computing Services Allocated
01234 97 8 Bedford, Bedfordshire Geographic Virtual B1
National Belgacom International Carrier Services SA Allocated
01234 97 9 Bedford, Bedfordshire Geographic Virtual B1
National SiPalto Allocated
If I'm a scammer, I don't need to bother with numbers that are 'Geographic
Virtual' because they're VOIP or something similar. While Geographic BT are
going to be physical Openreach connections (unless ported, which is
impossible to determine) and Geographic Cable will be that.
So I program my system to ring the Geographic BT people with the 'hello
we're BT Openreach disconnections' message, the Geographic Cable people with
'hello we're Virgin Media disconnections' and I don't call the Geographic
Virtual people at all. By skipping the Virtual ranges I can whittle down
the number of calls I need to make quite a bit (these calls cost money when
made in this quantity).
Next up, if I'm a smart scammer I play everyone a recorded message with the
story and ask them to press 1. This filters out answering machines and
people who don't fall for the scam. Now I have a nice feed of
higher grade marks I can get my scammer call centre to answer.
Theo