Spam Activity: Key Statistics
Quarter over Quarter comparison: March 1,2023 - May 31,2023

Each reporting period, we analyze domain names reported for spam. We collect spam reports from three reputation blocklists (Spamhaus, SURBL, Invaluement). We eliminate duplicates and enhance these reports with other metadata — domain and IP address registration data, ICANN registry and registrar monthly reports, routing data, attack type, and other indicators — to create spam records. We use the spam records to measure and report key statistics for each reporting period.

A comparison of key statistics for the periods December 1, 2023 - February 28, 2023 and March 1,2023 - May 31,2023 appears in the table below.

Measurement December to February 2023 March to May 2023 Change
in
Measurement
Total number of spam reports collected from feeds (per quarter) 850,305 1,548,190 697,885
Total number of spam records produced from spam reports 652,173 1,213,448 561,275
Unique domain names reported for hosting spammed content or spambots 623,626 1,093,054 469,428
Top-level Domains (TLDs) with domain names reported for hosting spammed content or spambots 615 687 72
Registrars (by distinct IANA ID) that had gTLD domains under management reported for hosting spammed content or spambots 1,352 2,303 951
Registrars (by distinct name) that had domains under management reported for hosting spammed content or spambots 2,133 3,274 1,141
Hosting Networks (ASNs) where we observed hosted spammed content or spambots 3,408 4,803 1,395
Number of subdomain reseller accounts reported for hosting spammed content 12,647 45,768 33,121

Quarterly Update:
Key Statistics
Quarter over Quarter:
Key Statistics		 Quarter over Quarter:
Top Level Domains		 Quarter over Quarter:
Registrars		 Quarter over Quarter:
Hosting Networks