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That wouldn’t work as they almost certainly use CGNAT so an IP address is shared with thousands of subscribers. If I had to guess, they probably have a process
by mpeg 4y ago
That wouldn’t work as they almost certainly use CGNAT so an IP address is shared with thousands of subscribers.
If I had to guess, they probably have a process similar to a cookie sync to obtain this id.
- tsimionescu 4y agoThey're the carrier: they know exactly at every time what IP:port belongs to each phone, otherwise they couldn't send the response packets back to the phone.
- mpeg 4y agoBut they have to communicate this to the advertisers in the RTB bidstream, in a way that advertisers can decode to a unique subscriber identifier (or at least unique enough) Sending just the IP would be useless, as the publisher already has the IP address (and sends it to bidstream, although it is truncated for privacy) so there would be little incentive to pay for the carrier data. I worked in adtech for a while, and designed a system similar to this for a large UK carrier, although it never ended up being implemented as carrier was worried about optics.