Internet Measurement
& Intelligence
Home of the world's single largest Internet domains dataset
3.235B+
Domains
10.7PB
Data Processed
1519
TLDs
Products & Services
Dataset Access
Freely available sorted list of Internet domains. The most comprehensive dataset available.
Learn moreSoOPNav
GPS-denied positioning using cellular, WiFi, BLE, Meshtastic, and APRS signals. Sub-15m accuracy.
Learn moreFeatures
01
Massive Scale
Over 3.235B+ domains indexed and growing. The largest public domain dataset available.
02
Regular Updates
Continuously updated with Newly Observed Hostnames (NOH) — first-seen names discovered through our crawling and DNS-observation infrastructure.
03
TLD Coverage
Comprehensive coverage across all top-level domains, including country-code TLDs.
04
Open Source
BSD-3-Clause licensed. Use it freely for research, security, and commercial applications.
05
DNS Data
Historical Forward DNS records available for subscribers. Track domain changes over time.
06
API Access
Real-time Newly Observed Hostnames (NOH) feed, delivered over WebSocket. Stay ahead of threats.
Pricing
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Latest Research
Poisoned Wells
Examining the scale of DNS censorship in India
Read PaperMisty Registry: An Empirical Study of Flawed Domain Registry Operation
USENIX Security research paper examining domain registry operations and their security implications.
Read PaperUseful Resources
Malicious Domain Names Detection Algorithm Based on Lexical Analysis
Algorithm development for malicious domain detection.
Read PaperDetection of Malicious Domains Through Lexical Analysis
Methods for detecting malicious domains using lexical features.
Read PaperEnabling Network Security Through Active DNS Datasets
Research on using active DNS data for network security.
Read PaperAbout
DomainsProject is an Internet measurement and intelligence organization. We map the Internet's namespace at scale — crawling DNS across hundreds of millions of domains, tracking how they are registered, hosted, secured, and abandoned. Along the way we've processed over 10.7PB of Internet traffic and built the world's single largest open dataset of more than 3.235B+ unique domains.
Our measurements power original research on hosting concentration, mail security, IPv6 adoption, and the life cycle of domains, as well as comprehensive* data feeds for security researchers, academics, and organizations fighting cyber threats.
The project is open source under the BSD-3-Clause license, and has been cited in numerous academic papers and used by security professionals worldwide.
*Comprehensive doesn't include Russian domains. The Russian Federation is subject to extensive, indefinite sanctions. DomainsProject does not process, collect, or store Russian domain data. In the unlikely event that any Russian domain reference appears in our dataset, it originates exclusively from third-party data sources and does not reflect any direct processing on our part. We maintain a strict zero-tolerance policy toward Russian domain infrastructure.