Network & IP

IP lookups, subnet calculators, and network diagnostics

What Is My IP

Discover your public IP address with ISP, location, and timezone details.

WebRTC Leak Checker

Detect if WebRTC exposes your real IP address, even when using a VPN.

Subnet Calculator

Calculate network address, broadcast, host range, and more from CIDR notation.

MAC Address Generator

Generate random MAC addresses with configurable format and address flags.

DNS Lookup

Query all DNS record types for any domain using Cloudflare's DNS-over-HTTPS API.

MX Lookup

Look up mail server (MX) records for a domain and identify the email provider.

SPF Record Checker

Look up and validate SPF records to check email authentication for any domain.

WHOIS Lookup

Look up domain registration details using the modern RDAP protocol.

SSL Certificate Checker

Check SSL/TLS certificate details for any domain using Certificate Transparency logs.

Analyse your network configuration and diagnose connectivity issues with our free online network tools. Look up your public IP address, check for WebRTC leaks, calculate subnets, and generate MAC addresses. All tools run client-side in your browser where possible, with external lookups kept to a minimum for your privacy.