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Free Tools

Powerful diagnostics for your infrastructure.

Use our free utilities to troubleshoot outages, validate networking, and reduce incidents faster.

Domain Expiry Checker

Find registration and expiration details for your domain names in seconds.

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IPv4 Subnet Calculator

Calculate subnet masks, ranges, and address allocation instantly.

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Downtime Cost Calculator

Estimate the business impact of outages and prioritize reliability work.

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SSL Certificate Expiry Checker

Check certificate validity dates and identify endpoints close to expiry.

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Disposable Email Checker

Detect temporary email addresses to improve lead quality and reduce abuse.

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Cron Expression Parser

Translate cron schedules into plain English instantly as you type.

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A Record Lookup

Look up the IPv4 addresses (A records) associated with any domain name.

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AAAA Record Lookup

Look up the IPv6 addresses (AAAA records) associated with any domain name.

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CNAME Lookup

Look up canonical name records to see where a domain aliases to.

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Nameserver Lookup

Find the authoritative nameservers responsible for any domain.

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Reverse IP Lookup

Find the hostnames associated with an IP address using reverse DNS.

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SOA Lookup

Retrieve the Start of Authority record to see zone configuration details.

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SRV Record Lookup

Discover services available for a domain including priority, weight, and port.

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TXT Record Lookup

Retrieve TXT records to inspect SPF, DKIM, verification tokens, and more.

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CAA Lookup

Check which Certificate Authorities are authorized to issue certificates for a domain.

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SPF Checker

Validate SPF records and inspect mechanisms to secure your email delivery.

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DMARC Checker

Validate your DMARC policy and inspect tags for proper email authentication.

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DKIM Checker

Validate DKIM records by looking up the public key for a given selector.

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