This period saw 9,919 new domains added and 3,938 removed across major block lists. Steven Black Unified Hosts led the volume race with 7,500 additions and 3,899 removals. EasyList, AdGuard DNS Filter, and AdGuard Base Filter all saw significant action as well.
The Curious Case of exdynsrv.com: Added, Then Axed
exdynsrv.com made a brief cameo across multiple lists—AdGuard Base Filter and EasyList both added it on July 28, only to remove it within the same period. Several of its subdomains (main.exdynsrv.com, syndication.exdynsrv.com) were also swiftly removed from AdGuard DNS Filter.
Why it matters: Removals like this usually mean a false positive or a hasty correction. If you run analytics or ad operations and saw a sudden spike in outages or support tickets related to this domain, it was likely blocked for just a few hours. If you rely on third-party services using exdynsrv.com, double-check for any knock-on effects.
Adware Network Domains Get the Fast-Track Treatment
Several domains—a.bdutrfpls.com, c.bdutrfpls.com, a.chmsrv.com, and s.chmsrv.com—were also whiplashed: added and then quickly removed from AdGuard DNS Filter. All landed and exited on July 28.
Why it matters: This kind of churn is a red flag for list maintainers and anyone automating blocklist deployments. If your infrastructure relies on fast-moving third-party domains, expect occasional collateral damage and consider fallback routes.
360yield-basic.com: A New Player on Peter Lowe's List
360yield-basic.com popped up as a new addition to Peter Lowe's Ad and Tracking Server List. 360yield is tied to programmatic advertising infrastructure, often seen in bid requests and ad beacons.
Why it matters: Marketers and MarTech teams should note: this domain is now flagged by one of the most widely used tracking blocklists. If you use 360yield for ad serving or analytics, expect more users with blockers to miss your pixels and impression logs.
Machine-Generated Domains Flood EasyList
A parade of random-looking domains—like 3vob9cfnoy2p56.rest, 91ljv4581ut5hbgq1zlkn63m.cfd, and 8wp91cpf.xyz—were added to three lists at once: AdGuard Base, AdGuard DNS, and EasyList. This is typical of disposable ad/tracker infrastructure, often spun up to evade blocking.
Why it matters: If you see traffic from these domains, expect it to drop fast. Blocklist maintainers are catching these on day one. If your partner networks use similar tactics, be prepared for rapid block and replace cycles.
Numbers This Period
| List Name | Added | Removed |
|---|---|---|
| Steven Black Unified Hosts (ads + malware) | 7,500 | 3,899 |
| AdGuard DNS Filter (ads) | 817 | 6 |
| EasyList (ads) | 775 | 1 |
| AdGuard Base Filter (ads) | 774 | 1 |
| Online Malicious URL Blocklist (malware) | 28 | 30 |
| EasyPrivacy (tracking) | 11 | 0 |
| AdGuard Tracking Protection Filter (tracking) | 8 | 0 |
| uBlock Filters – General (ads) | 2 | 0 |
| Dan Pollock's Hosts File (ads) | 2 | 0 |
| Peter Lowe's Ad and Tracking Server List | 1 | 0 |
| uBlock Filters – Badware Risks (malware) | 1 | 0 |
| AdGuard Annoyances Filter (annoyances) | 0 | 1 |
Next digest drops July 31, 2026. For real-time lookups, visit isblocked.fyi.