Reverse PTR lookup for IPv6

More dig commands

• Query TXT/SPF, DKIM and DMARC at once
  for r in example.com _dmarc.example.com sel._domainkey.example.com; do dig +short TXT $r; donecopy

  Pull SPF, DMARC and DKIM TXT records in one loop for mail audits

• Check CAA records before issuing certs
  dig +short CAA example.comcopy

  Show which CAs may issue certs; missing CAA lets any CA issue

• Resolve SRV records for service discovery
  dig +short SRV _sip._tcp.example.comcopy

  Get priority/weight/port/target for a service; used by AD, SIP, XMPP

• Force TCP and show remaining TTL
  dig +tcp +ttlunits +noall +answer example.com @8.8.8.8copy

  Test TCP/53 reachability; +ttlunits prints TTL as 1h/30m not raw seconds

• Clean answer-only output
  dig +noall +answer example.comcopy

  Strip headers/stats; show only the answer section for scripting/diffs

all 11 dig commands →