iOS 27 Blocks 'The Trade Desk' Ads on Safari Browser
The 'adsrvr.org' domain belonging to 'The Trade Desk' has stopped working on the Safari browser on Apple devices updated to 'iOS 27', and Apple confirmed it is investigating without announcing any fix.
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The primary ad request and delivery domain "adsrvr.org" belonging to "The Trade Desk" stopped working on the Safari browser on affected Apple devices following the launch of "iOS 27" on September 14, 2026. This domain represents the main channel through which the company delivers ads for its advertisers on the open web, meaning outgoing requests from Safari to its network fail to arrive, causing blank spots in the ad placements purchased by the advertiser.
In the same context, during September, Apple added several names in the ad identification field to its blocklist, including "UID 2.0", "ID5", "Audigent", "LiveRamp", and "Permutive". "UID 2.0" is known as one of the most prominent alternatives introduced by the industry to compensate for the decline of traditional tracking cookies. Apple acknowledged it is looking into the matter, but has not published any fix or public comment as of the time of writing this report.
On the other hand, Google's domain "ad.doubleclick.net" continued to deliver ads, making it likely from the advertiser's perspective that the block targets a specific party over another. The report pointed out that advertisers cannot practically distinguish between an intentional block and a technical glitch, because the impact on the campaign is identical in both cases.
These developments affect advertisers and agencies in the region who purchase ad spaces on the open web via demand-side platforms, as the disruption of the delivery domain means a direct loss of impressions and a deviation in campaign figures. This makes performance measurement and permissions monitoring a daily task for marketing teams at companies and agencies.
What do these terms mean?
Safari: The default web browser on Apple devices. Delivery domain: The web address from which ads are requested and delivered to the browser. Blocklist: A list maintained by the browser of entities it prevents from operating. UID 2.0: A user identification standard for advertising purposes as an alternative to tracking cookies. Demand-side platform: A system through which an advertiser purchases ad space automatically.
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