Public DNS IP Lookups
Review widely known resolver IPs that are useful for IP, ASN, reverse DNS, and network research workflows.
Open collection →Collections
Use collections when you want grouped examples, recognizable providers, and cleaner paths into research instead of starting from a blank search box.
Browse grouped lookup targets, themed research sets, and practical starting points for public infrastructure review. Collections help you move faster when you want examples, benchmarks, or recognizable targets instead of starting from a blank search box.
Major Tech Domain Lookups
Explore common technology and internet-platform domains for DNS, RDAP, SSL, and hosting-oriented analysis.
Open collection →Cloud Provider ASN Lookups
Browse major cloud and infrastructure ASNs when you want broader network-operator context.
Open collection →Browse collections by research style
Collections are best used as structured starting points. Instead of guessing which domain, IP, or ASN to test first, you can begin with a recognizable provider or public target and learn how real-world infrastructure is usually configured.
Popular infrastructure targets
Mail and provider research
How to use collections without losing context
Collections are strongest when you use them as an entry point instead of a destination.
Start with a recognizable target
Open a known IP, domain, or ASN collection when you want fast examples or a clean benchmark for how a real-world target is configured.
Run the right live tool next
After selecting a target, jump into IP lookup, DNS lookup, RDAP, SSL, reverse DNS, or mail-authentication tools for deeper analysis.
Compare and learn as needed
If a result is unclear, move into the comparison guides or learn hub to understand what the signals mean.