Dig

$ dig
-bash: dig: command not found

Install dig command

apt install dnsutils

Result

$ dig

; <<>> DiG 9.11.5-P4-5.1-Debian <<>>
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43245
;; flags: qr rd ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			81669	IN	NS	b.root-servers.net.
.			81669	IN	NS	m.root-servers.net.
.			81669	IN	NS	c.root-servers.net.
.			81669	IN	NS	k.root-servers.net.
.			81669	IN	NS	d.root-servers.net.
.			81669	IN	NS	g.root-servers.net.
.			81669	IN	NS	j.root-servers.net.
.			81669	IN	NS	e.root-servers.net.
.			81669	IN	NS	l.root-servers.net.
.			81669	IN	NS	i.root-servers.net.
.			81669	IN	NS	h.root-servers.net.
.			81669	IN	NS	f.root-servers.net.
.			81669	IN	NS	a.root-servers.net.

;; Query time: 21 msec
;; SERVER: 192.168.100.1#53(192.168.100.1)
;; WHEN: Mon Apr 06 15:44:42 CEST 2020
;; MSG SIZE  rcvd: 239