Free tools

Network and domain tools. No signup required.

Domain Expiry Checker

Check when your domain expires. See days left, registrar, IP, and registration status. No account needed.

Look up DNS records for any domain. Check A, AAAA, MX, TXT, NS, SOA, SRV, CAA. See values, TTL, and priority.

Find the geographic location of a website. See country, region, and city based on the server's IP. No account needed.

Find the IP address of your website or any domain. See all IPv4 and IPv6 addresses it resolves to.

Calculate network address, range, subnet mask, and host count for any IPv4 or IPv6 address and CIDR prefix.

Check if a URL is reachable and see response time. Min, max, and average response time in milliseconds. No account needed.

Calculate allowed downtime or uptime from an SLA percentage. See daily, weekly, monthly, and yearly values. Optional revenue-based cost estimate.

Create and validate cron expressions. Standard or Quartz format, human-readable breakdown, and upcoming run dates. No account needed.