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🌐 Network

📡Ping Tool 🔌Port Checker 🔄Reverse DNS 🗺️IP Lookup 🔍Site Status

🔍 DNS

🔎DNS Lookup 🌍DNS Propagation 📧MX Records

📧 Email Auth

🛡️SPF Checker 🔑DKIM Checker 📋DMARC Checker

🔒 Security

🔐SSL Certificate 📄HTTP Headers 📁WHOIS Lookup

All Tools

14 free network diagnostic tools. No sign-up, no limits.

🌐

Network

5 tools

Measure round-trip latency and packet loss to any host.

Check if a TCP port is open or closed on any host.

Reverse DNS Lookup

Find the hostname associated with an IP address.

Find location, ISP and ASN for any IP address.

Site Status Checker

Check if a website or service is up or down right now.

🔍

DNS

3 tools

DNS Propagation

Check if DNS changes have propagated globally across resolvers.

Query A, AAAA, CNAME and other DNS record types.

MX Record Lookup

Look up mail exchange records for any domain.

📧

Email

3 tools

Validate the SPF TXT record for a domain.

Verify DKIM public key records for email signing.

Inspect DMARC policy — protect against email spoofing.

🔒

Security

3 tools

SSL Certificate

Inspect SSL cert validity, expiry, issuer and cipher.

Domain registration info — registrar, expiry, nameservers.

Inspect HTTP response headers and security score.