8,236 domains added. 4,507 domains removed. Steven Black Unified Hosts led the pack by volume, but AdGuard DNS Filter wins for pruning—over 4,000 domains dropped. Most adds this period came from the usual ad/malware suspects, but a few removals and high-consensus adds deserve a closer look.

0941.org: The Blink-and-You-Miss-It Block

0941.org was added to the AdGuard DNS Filter on June 28, then promptly removed the same day. This kind of fast reversal usually means one of two things: a false positive caught just in time, or a block that sparked enough pushback to get noticed. For developers relying on 0941.org, this is a reminder that not every block is permanent—but even brief inclusion can break third-party integrations or analytics. If you depend on a domain that suddenly vanishes from users’ requests, check if it made a cameo on a block list. The window for confusion can be hours, not days.

High-Consensus Add: trolleyincreasingly.com

trolleyincreasingly.com landed on four major lists at once: AdGuard Base Filter, AdGuard DNS Filter, EasyList, and uBlock Filters – General. When a domain gets simultaneous consensus like this, it’s not an accident. This is likely a new ad or tracker domain that showed up across enough telemetry or user reports to trigger mass blocking. If your ad or analytics partner is using creative rotating domains, expect this kind of catch-up from the blocklist crowd. For anti-adblockers: rotating names is only a short-term shield.

Pattern Watch: The .cfd and .rest Swarm

Six new domains added to EasyList this period use the .cfd or .rest TLDs, including 4fw4gtgnyfpq7cye9k25k8c.cfd and 2nhlu4qwkxuvhnfbowzn8iwzl67i.rest. These names look machine-generated—long strings, little meaning. This points to automated tracker or malvertising infrastructure spinning up new endpoints to evade blocks. For MarTech and security teams, don’t hardcode allowlists based only on TLD or domain shape. Automated systems are churning out new names faster than humans can keep up.

AdGuard DNS Filter: The Great Purge

AdGuard DNS Filter removed over 4,000 domains, including 11xkkhe8hd.com, 51dh.xin, and many more added just a day before. This bulk removal likely reflects an effort to clean up short-lived or mistaken entries. If your infrastructure sits behind rapidly changing domains or CDNs, you might get caught in these sweeps. Track blocklist status if your uptime matters—these filters are not set-and-forget.

Numbers this period

Next digest drops July 1, 2026. Until then, check your domains’ status at isblocked.fyi.