Diagnostics

DNS Lookup

Resolve any DNS record of a domain (or the PTR of an IP) using DNS-over-HTTPS. The query travels encrypted to Cloudflare; the rest of the site stays 100% local.

Queries are resolved via Cloudflare's DNS-over-HTTPS (1.1.1.1) over HTTPS; they do not pass through any redzilla server.

redzilla.cl — dig

Name	Type	TTL	Data

Runs locally in your browser · no sign-up · nothing leaves your browser

How it works

The tool resolves DNS records for a domain using DNS-over-HTTPS (DoH, RFC 8484): it sends the query encrypted over HTTPS to the Cloudflare JSON endpoint (cloudflare-dns.com, the 1.1.1.1 resolver) and shows the response in a dig-style readout and a table, with the name, type, TTL and data of each record. It supports the A, AAAA, MX, TXT, NS, CNAME, SOA, CAA and PTR types.

For reverse DNS it builds the PTR name automatically: if you enter an IPv4 address it reverses the octets and appends .in-addr.arpa (1.1.1.1 → 1.1.1.1.in-addr.arpa); for IPv6 it expands the address into its 32 reversed nibbles under .ip6.arpa. The response status follows the standard DNS codes: 0 is NOERROR (success) and 3 is NXDOMAIN (the name does not exist).

Example: checking the mail setup of a domain via its MX records

Type the domain (for example example.com) and pick the MX type.
The answer lists the mail servers with their priority, for example 10 mail.example.com: the lowest number is tried first.
If the status is NXDOMAIN or there are no answers, the domain publishes no MX records and mail to that domain will fail or fall back to the A record depending on the client.

Frequently asked questions

What does the TTL of a DNS record mean?

It is the time in seconds a resolver may cache the answer before asking again. A TTL of 300 means changes can take up to 5 minutes to show from that resolver; a TTL of 86400, up to a day. That is why it pays to lower the TTL ahead of a migration.

What is the difference between an A record and a CNAME?

An A record points a name directly to an IPv4 address (and AAAA to IPv6). A CNAME points a name to another name, which is then resolved in turn: it is an alias. The domain apex (example.com with no subdomain) must not carry a CNAME per the standard; use A/AAAA there or provider-specific ALIAS variants.

How do I look up the reverse DNS (PTR) of an IP?

Type the IP directly (for example 8.8.8.8) and the tool detects it is an address: it builds the reverse name under in-addr.arpa or ip6.arpa by itself and forces the PTR type. The PTR is published by the owner of the IP block (usually the ISP), not the domain owner, and is key for mail server reputation.

Where does my DNS query travel to?

The query goes encrypted over HTTPS straight from your browser to the Cloudflare public resolver (1.1.1.1); it does not pass through any redzilla server and the site keeps no log of it. That is the only part of the tool that touches the network: everything else runs locally.

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Disclaimer

We take great care to keep every tool accurate and review it thoroughly; even so, we can't guarantee it is free of errors or take responsibility for how the results are used. We recommend double-checking anything critical.

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