3,230 new domains added, 209 removed. The AdGuard DNS Filter (+1,095) and AdGuard Base Filter (+1,043) led the activity. EasyList kept pace with 1,039 additions. The real drama, though, unfolded in the removals.

Error-Report.com: In and Out in 24 Hours

error-report.com saw a quick reversal. Added to AdGuard Base Filter, AdGuard DNS Filter, and EasyList on October 23, it was cut from all three lists by October 25. That usually signals a false positive. Someone likely flagged legitimate telemetry or support traffic as adtech, then realized it was breaking non-ad functions. If you rely on this domain for diagnostics or analytics, you're back in the clear. For now.

Sonos Escapes the Block

click.email.sonos.com was removed from Peter Lowe’s Ad and Tracking Server List just a day after being added. This is Sonos’s email marketing and transactional link tracker. Its brief listing could have broken click tracking or customer journeys for Sonos emails. If you manage email flows for major brands, check your domains—blocklist churn isn’t just hitting sketchy trackers.

Unifybots.com: Triple Delist

unifybots.com was delisted from AdGuard DNS Filter, AdGuard Tracking Protection Filter, and EasyPrivacy within a day of its initial block. When a domain is removed from three major tracking lists at once, that’s a strong signal it was either a mistaken inclusion or the operator appealed the listing. If your own domains ever land in multiple privacy lists, this is the kind of coordinated removal you want.

Spyrep.com: The Consensus Tracker

spyrep.com is now on four lists: AdGuard DNS Filter, AdGuard Tracking Protection Filter, EasyPrivacy, and Peter Lowe's. Rare to see such quick agreement across both ad and tracking lists. If your site loads resources from here, expect widespread breakage. This is a textbook example of a domain that’s now considered radioactive by privacy maintainers.

.cfd and .rest: Tracker Cloning in Bulk

A cluster of new domains with randomized subdomains and .cfd or .rest TLDs hit three lists at once (AdGuard Base, DNS, EasyList). Examples: 88884zeebz6um74p3qn7eggep.cfd, 2ehvl111jccg2mg4824.cfd, 7imiy33o9vkqvrggxo2xr8y3.rest. These look like auto-generated tracker or redirector domains. If you see this pattern on your network, assume it’s a throwaway tracker scheme and check for new variants weekly.

Numbers this period

Next digest: October 28, 2026. For domain lookup and block status, visit isblocked.fyi.