Copyright 2012-2014 Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains certain
rights in this software.

Copyright 2014-2015 VeriSign, Inc.

dnsviz/base32.py
  Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006 Python Software Foundation;
  All Rights Reserved
  PSF license: https://docs.python.org/2/license.html

  The contents of dnsviz/base32.py are derived the base64 module of python 2.7,
  with the value of _b32tab modified to use the Base 32 Encoding with Extended
  Hex Alphabet, as specified in RFC 4648.

doc/src/error.svg
  Public domain: https://en.wikipedia.org/wiki/File:Ambox_warning_pn.svg

doc/src/warning.svg
  Public domain: https://en.wikipedia.org/wiki/File:Ambox_warning_yellow.svg