Dear colleagues, Recently my research team completed an analysis of ~4.3 million domains spanning 2025-12-01 to 2026-03-31, identifying approximately *1.25 million potential clusters (i.e. associated domain groups)*. Here's our cluster breakdown by detection strategy: - Prefix + TLD clustering (Strategy A): ~469K clusters — domains sharing a fixed alphanumeric prefix with variant suffixes under the same TLD. (example below) - Exact apex clustering (Strategy B): ~726K clusters — identical second-level domain registered across multiple TLDs. - N-gram fuzzy clustering (Strategy C): ~50K clusters — near-duplicate apex names detected via trigram locality-sensitive hashing. [image: image.png] Happy to share the original report / ADC group file offline once it's available. Hope this further helps shape the answers to Charter Question 2. Thanks! Best, Ching *Ching Chiao * *Head of APAC & Corporate Development* Check our latest *Internet Abuse Signal* research: https://main.whoisxmlapi.com/blog/to-cache-a-predator-ilovepoop-toolkit-reac... *WhoisXMLAPI.com <http://WhoisXMLAPI.com>* *中文：https://zh.main.whoisxmlapi.com/ <https://zh.main.whoisxmlapi.com/>* *日本语 ：https://ja.main.whoisxmlapi.com/ <https://ja.main.whoisxmlapi.com/>* LinkedIn : https://www.linkedin.com/in/chiao/ Book a meeting now: https://calendar.app.google/9neWrkwvhPHRqGZ86
