It's carrier grade NAT
Before I left AT&T (unless it's changed) the goal was to migrate users to IPv6 via carrier grade NAT, and knowing how much they love to screw customer for an extra buck it wouldn't surprise me if this was still the plan, hopefully one day every customer will flee from them and we can do without them and they can just disappear... One can only hope
I am no longer an AT&T Employee. Check out my kudos! »/profile/1626573
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