Network & Security Tools

Check DNS record propagation across 20+ global locations in real time.

Full DNS map of a domain: records, email security, registrar, subdomains, and a health score.

Query A, AAAA, CNAME, MX, TXT, and NS records for any domain.

Registrar, registration dates, nameservers, and domain ownership.

Find the mail servers responsible for a domain.

Resolve an IP address back to its hostname.

Verify the DNSSEC chain of trust for a domain.

See which CAs are authorized to issue certs for a domain.

See which nameservers are authoritative for a domain.

Inspect the certificate chain, issuer, and expiry of any site.

Audit protocol versions and cipher suites for weaknesses.

Grade CSP, HSTS, X-Frame-Options, and other security headers.

Find out exactly when a TLS certificate expires.

Discover a domain's subdomains via certificate transparency logs.

SPF, DKIM, DMARC, and MX configuration in one report.

Validate and build a correct SPF record.

Validate and build a DMARC policy for your domain.

Look up and validate a domain's DKIM signing record.

Check an IP or domain against major email blacklists.

Find out if a website is down for everyone or just you.

Inspect status codes, redirects, and response headers.

Trace the full redirect chain for any URL.

Detect the frameworks, servers, and services a site runs on.

Preview how a URL appears when shared on social media.

Measure reachability and latency to a host.

Trace the network path packets take to a destination.

Measure latency to a host from multiple regions at once.

Your public IP address, location, and network details.

Geolocation, ASN, and hosting provider for any IP.

Calculate ranges, masks, and host counts for a CIDR block.

Build and decode cron schedules in plain English.