Network & Privacy Tools
Explore IP, DNS, privacy, web security and email diagnostic tools.
IP & Network
Inspect addresses, providers, routing ownership and network ranges.
IP Address Lookup
Look up an IPv4 or IPv6 address.
IP Location Lookup
Understand approximate IP location.
My ISP
Understand your detected network provider.
ASN Lookup
Look up the network prefix, ASN, and operator associated with a public IP address.
IPv4 / IPv6 Checker
Check whether this site observes your current connection over IPv4 or IPv6.
IPv6 Calculator
Expand, compress, and calculate IPv6 addresses and prefixes locally.
Subnet Calculator
Calculate IPv4 subnet masks, ranges, and host counts.
CIDR Calculator
Convert IPv4 CIDR notation into ranges and address counts.
IP Range to CIDR Converter
Convert an IPv4 range into the smallest exact set of CIDR blocks.
Ping / Latency Test
Measure TCP connection latency to a public target.
DNS & Domain
Resolve records, hostnames, registration data and DNS changes.
Web & Security
Check public services, browser details, certificates and security headers.
Port Checker
Test one TCP port on one public host or IP address.
Browser Information
Inspect the user agent, platform, language, and viewport reported by this browser.
IP Blacklist Check
Check a public IPv4 address against selected DNS blacklists.
SSL Certificate Checker
Check certificate expiry, issuer, and TLS details.
HTTP Headers & Redirect Checker
Inspect response headers, status, and redirects.
Security Headers Checker
Inspect important browser security headers on a public website.
Inspect mail routing and email authentication records.
Privacy
Review VPN, browser and IP-version signals visible from your connection.
Internet Privacy Check
Review grouped IP, network, location, and privacy signals available for your connection.
VPN / Proxy / Tor Check
Review available network indicators for recognized VPN, proxy, Tor, or hosting connections.
Is My VPN Working?
Interpret whether available network indicators are consistent with the VPN connection you expect.
WebRTC Leak Test
Check browser WebRTC candidates.
IPv6 Leak Test
Test whether a dedicated IPv6 endpoint can observe an IPv6 connection.
DNS Leak Test
Check DNS leak test availability.
Currently unavailable