DNS troubleshooting

DNS issues are often caused by stale records, incorrect nameservers or cached resolver responses.

Check A and AAAA records

dig A example.com +short
dig AAAA example.com +short

Check nameservers

dig NS example.com +short

Query a specific resolver

dig @1.1.1.1 example.com A +short
dig @8.8.8.8 example.com A +short

Trace resolution

dig example.com +trace