One way to get a quick idea of who is sponsoring or publishing a website is to understand the domain name portion of the URL.
.com
Commercial businesses and for-profit organizations
.edu
Educational institutions
.net
Organizations directly involved in Internet operations
.org
Miscellaneous organizations that don't fit any other category, such as non-profit groups.
.gov
United States federal government organizations
.mil
United States military organizations
~ (tilde)
Web pages created independently by individuals
country codes
A two-letter international standard abbreviation such as ".de" for Germany or ".uk" for the United Kingdom