Network tools that explain themselves.

Your public IP address, reverse DNS and network – also as plain text for curl.

IPv6 readiness, latency and jitter, WebRTC IP leaks and what your browser tells every website.

Every record for a name from a public resolver of your choice, with plain-English notes.

Ask 15 public resolvers around the world the same question and see who has your change.

Is the zone signed, does the chain of trust validate, and are the algorithms current?

SPF, DKIM, DMARC, MTA-STS, TLS-RPT and BIMI graded, with the exact records to fix what is missing.

Is an IP, a domain or its mail servers on the spam blocklists receivers use – and how to get delisted.

Certificate, chain, expiry, hostname match, key strength and the TLS version a server negotiates.

Redirect chain, response headers and a graded check of HSTS, CSP and the other security headers.

Who holds a domain, IP address or AS number – from the registry, via RDAP.

Origin AS, visibility, RPKI validity, upstreams and announced prefixes from the global routing table.

IPv4 and IPv6 prefixes: ranges, masks, host counts, reverse zones and splitting.

Key pairs and ready-to-use configs for both ends of a tunnel, made in your browser – keys never leave it.

Who made a network card, from the IEEE registry – and whether the address is randomised.

Look up any DN42 object – AS, IP, prefix, maintainer, person or .dn42 domain – with everything linked to it.

Unregistered AS numbers, free IPv4 blocks and a random unused IPv6 /48 – checked against the live registry.

WireGuard, BIRD 2 and RouterOS 7 configs for a DN42 peering, following the wiki conventions.