Catalog

All tools

Fast, private network tools: IP geolocation, DNS checks, WHOIS, DNS propagation, traceroute, security analysis and more. No ads, no signup.

Network

Low-level network queries and diagnostics.

IP Lookup

Instant geolocation, ISP, ASN, abuse history and reputation for any IPv4 or IPv6 address.

WHOIS Lookup

Domain ownership, registrar, nameservers and key dates.

Speed Test

Latency and throughput test against a globally-distributed edge.

DNS & Mail

DNS records, mail server posture, deliverability.

DNS Lookup

Query A, AAAA, MX, TXT, NS, SOA, CNAME, CAA and SRV records from authoritative resolvers.

Mail Check

Domain mail posture: MX, SPF, DKIM selector probe, DMARC.

Security

Threat intel, vulnerabilities, reputation.

Subdomain Finder

Enumerate subdomains via Certificate Transparency and OTX.

CVE Search

Search vulnerabilities by CVE ID, product, or keyword.

Utilities

Calculators, references, password tools.

Subnet Calculator

IPv4 + IPv6 CIDR math: range, mask, usable hosts, wildcard.

Password Strength

Password entropy, breach status, strength audit.

Ports Reference

Searchable reference of common TCP/UDP ports and services.

API Reference

REST API reference for every tool. Free for non-commercial use.

Browser

Safe URL preview and interactive browsing.

Safe Browser

Preview a URL in a sandboxed browser with threat screening.

Popular public IPs

Well-known public DNS resolvers and anycast services. Each link opens a full geolocation, ASN and reputation report.

1.1.1.1

Cloudflare DNS

Anycast public resolver

Cloudflare for Families

Malware blocking

1.1.1.3

Cloudflare for Families

Malware + adult filter

8.8.8.8

Google Public DNS

Anycast public resolver

Threat-blocking resolver, Zurich-based

Cisco Umbrella public resolver

Ad / tracker blocking

Russian public resolver

64.6.64.6

Verisign Public DNS

Privacy-respecting resolver

Family / adult content filter