delv

wikipedia:delv DNS lookup and validation utility

• http://manpages.ubuntu.com/manpages/xenial/man1/delv.1.html

• delv +vtrace
• delv +rtrace
• delv +mtrace

delv google.com
; unsigned answer
google.com.		32	IN	A	142.250.181.78

delv +rtrace www.google.com
;; fetch: www.google.com/A
;; resolution failed: timed out

delv +vtrace www.google.com
;; fetch: www.google.com/A
;; resolution failed: timed out

delv +mtrace www.google.com
;; fetch: www.google.com/A
;; resolution failed: timed out

/etc/resolv.conf

See also

• dig, host, nslookup, delv, axfr, resolvectl query, dig -t NS, dig -t MX, dig -t TXT, dig -t SOA
• DNS: Linux DNS, IP, systemd-resolve, /etc/hosts, whois, Domain registrar, dig, host, nslookup, scutil --dns dnsmasq, bind, delv, .local, .internal, .onion, FQDN, TTL, /etc/resolv.conf, /etc/systemd/resolved.conf, dscacheutil (macOS), hostname, hostnamectl, bind, resolvectl status, DNS sinkhole, Domain name server, LLMNR, Resource records:MX, TXT, NS, CAA, SSHFP, Apex, CNAME, Wildcard DNS records, Subdomain, /etc/nsswitch.conf, 1.1.1.1, 8.8.8.8, CoreDNS, dnsPolicy:, Google Public DNS, DNS caches, Kubernetes ExternalDNS, DNS forwarding, IDNA2008, DNS-1035