DDN

DDN may refer to:

Arts, media and entertainment

• Daydream Nation, a music album by Sonic Youth
• Dayton Daily News, a daily newspaper in Dayton, Ohio, US
• Digital Delivery Network, a service of the Community Radio Network in Australia
• Digital Distribution Netherlands, a Dutch digital music distributor
• Double Down News, an alternative media outlet in the UK
• Dustin's Daily News, a comedic current affairs TV show

Computing

• DataDirect Networks, a data storage company
• Defense Data Network, a separate instantiation of the ARPANET used by the U.S. Department of Defense from 1983 to 1995
• Dot-decimal notation, a human readable way to write IPv4 internet addresses

Other uses

• Dehradun railway station (station code), India
• Digital Divide Network, an online community of activists