CheckMyIP.tools

Pip’s toolbox

Free IP & network tools

14 friendly tools to check your privacy, test your connection, look up domains and do quick network maths – free, with no sign-up.

Privacy & security

VPN & Proxy CheckSee if your VPN hides you and what gives it away. WebRTC Leak TestCheck if your browser exposes your real IP via WebRTC. IP Blacklist CheckIs an IP on a spam blocklist (DNSBL)? Browser FingerprintWhat websites can learn without cookies.

Connection & network

Port CheckerIs a port on your IP reachable from the internet? Ping TestResponse time and packet loss to any host. TracerouteEvery network hop between us and a host.

DNS & domains

DNS LookupA, AAAA, MX, TXT, NS, CAA and more. WHOIS LookupRegistrar, dates and owner of a domain or IP. Reverse DNS LookupIP to hostname, and hostname to IP.

Calculators & converters

Subnet CalculatorNetwork, broadcast, host range and mask. IP to Decimal ConverterIP ⇄ decimal, hex, binary and octal.

Browser & device

What Is My User AgentYour browser’s ID string, decoded. Screen ResolutionScreen, window and pixel ratio, live.

Which tool do I need?

Not sure where to start? Here is a quick guide to the most common questions people bring to us, and the tool that answers each one.

  • “Is my VPN actually protecting me?” Start with the VPN & proxy check, then run the WebRTC leak test. A VPN is only doing its job if both show the VPN’s network, not your own provider.
  • “Why can’t my friends join my game server?” Use the port checker to see if the port is reachable from the internet. If it is closed even after you set up port forwarding, read about CGNAT.
  • “A website is slow or won’t load.” Ping it to see whether it responds and how quickly, then use traceroute to find where along the path the delay or loss starts.
  • “My emails are bouncing.” Check your mail server with the IP blacklist check, confirm its hostname with reverse DNS, and verify your MX, SPF and DMARC records with the DNS lookup.
  • “Who owns this domain or IP?” The WHOIS lookup shows the registrar, registration dates and the network owner’s abuse contact.
  • “How many hosts fit in this subnet?” The subnet calculator works out network, broadcast and usable host range for any IPv4 or IPv6 CIDR block.

How our tools work

Some tools run entirely in your browser – the user agent, screen resolution, browser fingerprint, subnet calculator and IP converter never send your data to us. Others need our server to do the work, because a browser is not allowed to send pings, run traceroutes or query WHOIS servers. For those, our server makes the request and shows you exactly what it saw. We do not store the results; see our privacy policy for details.

Each tool page explains what the result means and how to fix common problems. For deeper background, browse our guides.