dns-network
DNS & Network Debugging
Practical workflows for diagnosing DNS, connectivity, and latency problems.
DNS Lookups
dig (preferred tool)
# A record (IPv4)
dig example.com
# Specific record types
dig example.com AAAA # IPv6
dig example.com MX # Mail servers
dig example.com CNAME # Canonical name
dig example.com TXT # TXT records (SPF, DKIM, verification)
dig example.com NS # Nameservers
dig example.com SOA # Start of authority
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