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TL;DR


zone	`example.isitdns.net`: real public names in the `isitdns.net` zone
records	A, AAAA, CNAME, MX, SRV, CAA
ipv4	`192.0.2.1` (RFC 5737)
ipv6	`2001:db8::1` (RFC 3849)
answer	`txt.example.isitdns.net` TXT: "It was DNS. It is always DNS."
`+tls`, `+https`	`dig` 9.18+ or `kdig`

Asks one resolver for one address.

$ dig @1.1.1.1 example.isitdns.net A

; <<>> DiG 9.20.11-0ubuntu0.2-Ubuntu <<>> @1.1.1.1 example.isitdns.net A

; (1 server found)

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36864

;; flags: qr rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:

; EDNS: version: 0, flags:; udp: 1232

;; QUESTION SECTION:

;example.isitdns.net. IN A

;; ANSWER SECTION:

example.isitdns.net. 300 IN A 192.0.2.1

;; Query time: 35 msec

;; SERVER: 1.1.1.1#53(1.1.1.1) (UDP)

;; WHEN: Mon Sep 14 17:42:30 CDT 2026

;; MSG SIZE rcvd: 64

GO NOERROR, one A record, 192.0.2.1

NO GO SERVFAIL, or any address that is not 192.0.2.1

The id, Query time and WHEN line change on every run; the TTL counts down as the answer ages in a cache (RFC 1035 §3.2.1).

See also#