This period saw 8,835 new domain entries added and 4,050 removed across major ad and tracking blocklists. Steven Black Unified Hosts led the activity, with over 5,500 additions and 3,500 removals. AdGuard DNS Filter, EasyList, and AdGuard Base Filter also showed high volumes.
Rapid-Fire Removals: AdGuard DNS Filter’s Cleanup
AdGuard DNS Filter removed 20 domains it had just added on September 17, including 0rvv7l6k7g.com, 4ufutzmihl.com, and 5adbjiwp.xyz. These were short-lived on the blocklist—less than 48 hours. For developers and MarTech teams, this signals ongoing review and quality control. If you saw sudden analytics drops from these domains, expect a return to baseline. The speed of removal suggests either a false positive sweep or automated churn detection at work.
High-Consensus Blocks: Generated Domains Flood the Lists
Eight domains—like jqioregvpxgte.website and abamamusket.cyou—were added to three or more major lists at once. These domains all sport algorithmic, gibberish names and appeared on AdGuard Base, AdGuard DNS, and EasyList simultaneously. The multi-list agreement means these are likely part of a new malvertising or tracking campaign. For anyone monitoring traffic, treat new random-looking domains with suspicion: you’ll see these get blocked nearly everywhere, fast.
EasyList’s .cfd and .rest Bonanza
EasyList added a string of new domains with .cfd and .rest TLDs, including 6xhhygpw2z8bnp2x1h26m4k762qyuy4pt.cfd, 5ktb9epcyo9r1ewtiwpiymr.rest, and 8uy9oc8g6gwm9l.rest. The pattern: long, random subdomains and newish TLDs. This is a classic sign of programmatic tracker or malvertising infrastructure spinning up disposable endpoints. If your tools ingest referrers or touch these TLDs, expect more aggressive blocking and attribution gaps.
Peter Lowe’s List: Fourteen Domains Escape
Peter Lowe’s Ad and Tracking Server List removed 14 domains this period—the largest single cull among privacy-focused lists. While the domains themselves weren’t highlighted in the raw data, this is notable since Peter Lowe’s typically trims only after clear false positives or company outreach. If you’ve had a SaaS tool or analytics endpoint caught here, check if your support tickets paid off.
Numbers this period
| Blocklist | Added | Removed |
|---|---|---|
| Steven Black Unified Hosts (ads + malware) | 5,583 | 3,565 |
| AdGuard DNS Filter (ads) | 1,084 | 413 |
| AdGuard Base Filter (ads) | 1,051 | 0 |
| EasyList (ads) | 1,019 | 0 |
| Online Malicious URL Blocklist (malware) | 29 | 56 |
| AdGuard Tracking Protection Filter (tracking) | 26 | 2 |
| EasyPrivacy (tracking) | 20 | 0 |
| Peter Lowe's List (tracking) | 1 | 14 |
| Dan Pollock's Hosts File (ads) | 11 | 0 |
| uBlock Filters – Badware Risks (malware) | 10 | 0 |
| uBlock Filters – General (ads) | 1 | 0 |
Next digest drops September 22, 2026. For live lookups, head to isblocked.fyi.