🌐 Network & DNS Tools

Thirteen tools to diagnose a domain or host from the outside in — what DNS says about it, where its addresses are registered, which ports actually answer, and offline DNS reference/builder tools.

🔍 DNS Lookup

Look up every DNS record type for a domain in one pass.

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📍 IP Geo Lookup

Find the country, city and network behind an IPv4 or IPv6 address.

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🔎 WHOIS Checker

See a domain’s authoritative name servers and resolved addresses.

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🛡️ Port Scanner (Lite)

Check which common TCP ports are reachable on a host.

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📡 Ping Test

Test whether a host replies, and how long the round trip takes.

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🌍 Punycode / IDN Converter

Convert an internationalized domain name to Punycode and back.

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⏱️ DNS TTL Converter

Convert a DNS TTL between seconds and a human-readable duration.

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✅ Hostname / Domain Syntax Validator

Check a hostname against RFC 1035 label rules.

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🔁 Reverse DNS PTR Name Builder

Build the in-addr.arpa / ip6.arpa PTR name for an IP.

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📖 DNS Record Type Reference

What each DNS record type does, with example syntax.

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📬 MX Record Priority Sorter

Paste MX records and see the actual mail delivery order.

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📄 DNS Zone File Syntax Checker

Scan a pasted zone file for unrecognized record lines.

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🧩 Subdomain Name Generator

Get a checklist of common subdomain names for your domain.

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