Network diagnostics tools for system administrators, security researchers, and curious users. Look up DNS records (A, AAAA, MX, TXT, CNAME, NS) for any domain. Check SSL certificate validity and issuer. Look up WHOIS registration data. Identify the geographic location of any IP address. Scan common ports on a host. Calculate IPv4 subnet ranges and IPv6 addresses. Test internet connection speed. Inspect HTTP headers returned by any URL. All network tools work from LaiUse servers — queries are not logged or stored.
Look up Autonomous System Numbers (ASN) to find the organization and network range for any ASN. Powered by ipinfo.io.
Look up DNS records for any domain. Query A, AAAA, MX, TXT, CNAME, and NS records instantly.
Get embed code for the IPv4 Calculator — subnet math for your networking site.
Get embed code for the IPv6 Calculator — prefix/EUI-64 for your networking site.
Analyze HTTP security headers of any website. Get a security score and recommendations for best practices.
Find your public IP address and geolocation info. Get your IP, ISP, location, and network details instantly.
Calculate IPv4 subnets, CIDR notation, and IP ranges. Subnet calculator for network engineers and developers.
Calculate IPv6 address ranges and subnets. Works with IPv6 CIDR notation and prefix lengths.
Scan common ports on any IP address. Check if services are running and accessible — useful for network diagnostics.
Find reverse DNS (PTR) records for any IPv4 address. Used for email server verification and network diagnostics.
Generate random IPv4 or IPv6 addresses. Useful for testing, development, and network simulations.
Test your internet connection speed. Measure download and upload bandwidth with a simple browser-based speed test.
Check SSL certificate details for any website. Verify certificate validity, issuer, and configuration instantly.
Look up domain registration information. See registrant details, expiry dates, and name servers.