XN

XN may refer to:

• "xn--" in the ASCII representation of internationalized domain names
• Christians, based on the Greek letter Chi used by early Christians
• Nordic Patent Institute (two-letter code XN)
• A nuclear reaction that is expected to produce one or more neutrons
• Xpress Air (IATA code XN, 2003–2021), an Indonesian airline

See also

• XNN (disambiguation)