dothost is a DNS lookup utility, which produces output in Graphviz
format. It does this, not by using Graphviz, but by using the graph-easy
Perl module also available at slackbuilds.org

Example:

dothost www.iana.org | graph-easy --as boxart

  ┌──────────────────┐
  ∨                  │
┌────────────┐     ┏━━━━━━━━━━━━━━┓     ┌───────────────────┐
│ 192.0.32.8 │ ──> ┃ www.iana.org ┃ ──> │ 2620:0:2d0:200::8 │
└────────────┘     ┗━━━━━━━━━━━━━━┛     └───────────────────┘
                     ∧                    │
                     └────────────────────┘