What is adnxs.com?
adnxs.com belongs to Microsoft’s advertising exchange, originally AppNexus, later Xandr. Publishers use it to sell ad space in real-time auctions.
AdvertisingOwned by Microsoft, based in Redmond.
What it does on a page
It runs ad auctions, syncs ID cookies with other ad companies so they can recognise your browser, and delivers the winning ads.
Should you block it?
Blocking it doesn’t break sites. Some ad slots will stay empty.
Also seen as
ib.adnxs.com · secure.adnxs.com · AppNexus · Xandr
In the Browser Monster Index
81
checked websites loaded Microsoft (from adnxs.com or its other domains).
On 16 it loaded before visitors made any choice, and on 10 it was still seen after we clicked reject.
Other domains Microsoft uses: bat.bing.com, adnxs-simple.com, clarity.ms, c.bing.com.
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