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Network toolbox

DNS, RDAP, HTTP, TLS, and subnet math — all in deterministic, browser-only persistence. Pick a tool to get started, or run several at once with bulk lookups.

DNS Lookup

Resolve common DNS record types with structured output.

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DIG Lookup

Packet-level DNS queries with raw output, sections, flags, and TTLs.

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NSLookup

Quick A, AAAA, CNAME, and NS checks in a familiar flow.

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MX Lookup

Inspect mail exchanger records and priorities.

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TXT Lookup

Review SPF, DKIM, verification, and other text records.

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Reverse DNS (PTR)

Resolve an IP back to its hostname via PTR records.

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Multi-Resolver Compare

Run the same query across Cloudflare, Google, Quad9, OpenDNS, and custom resolvers.

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Domain Whois / RDAP

Fetch domain registration data through HTTPS RDAP.

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IP Registration Lookup

Find IP allocation and network registration data with RDAP.

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HTTP Header Inspector

Trace status, redirect chains, and security headers for any URL.

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TLS Certificate Inspector

Read the certificate chain, expiry, SANs, and trust status.

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Subnet Calculator

IPv4 and IPv6 CIDR math: network, broadcast, range, and counts.

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Bulk Lookups

Run any tool over a list of inputs and export the results.

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