Apple's iOS 27 update has blocked The Trade Desk's core ad serving domain, adsrvr.org, effectively preventing the DSP from serving ads on the Safari browser. The issue is currently under investigation by Apple's WebKit team, with no confirmed resolution or timeline for a fix.
The immediate fallout is a total loss of Safari reach for advertisers using The Trade Desk, creating a significant gap in cross-platform campaign execution. This move reinforces Apple's role as a gatekeeper that can unilaterally disable ad tech infrastructure, potentially forcing a shift toward walled gardens or Google's legacy domains which remain functional. The disparity between how WebKit treats TTD versus Google suggests a volatile environment for independent DSPs navigating privacy-centric OS updates. Industry observers should monitor the WebKit GitHub ticket for a formal resolution or a permanent reaffirmation of the block, which would signal a broader crackdown on third-party ad serving domains.
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