[manigandham]

The data is unchanged. Most ISPs have internal tracking for each request to see how network data flows. You can just think of this as Verizon leaving those tags on - and in this case it owns AOL so it's sharing within the same entity.

Not saying good/bad - just how they treat it.

[ihsw]

Zombie cookies are ones that are added to HTTP responses by the ISP, so that even if the user clears their cookies manually or opens their browser in incognito mode then the tracking cookie persists.