Tpc.googlesyndication.com and googleads.g.doubleclick.net getting through

[jfb]

This confirms that Pi-hole is blocking that domain and the client is using Pi-hole for DNS.

Either the browser is using an alternate DNS, or the ads are coming from other domains.

How do I determine what domain an ad is coming from?

Block ads or fix broken sites This FAQ is written in the context of finding out how to block an ad that isn't blocked automatically, but the same steps can be used to troubleshoot issues with sites that don't function properly. An example is that sometimes certain payment gateways try to collect metrics on the sale, but these domains are blocked by Pi-hole, so the payment cannot be processed. Also, some links send you through several referrers and if one of them is blocked, you may land on a …