The abbreviation HX stands for:

  • Half duplex mode in communications technology
  • HX convoys drove in World War II, first of Halifax, and later from New York to England
  • Hong Kong Airlines, Chinese airline ( IATA code )
  • Only intermittently active TMA, Note in aeronautical charts
  • The post code area Halifax ( as the initial letters of a postcode from the UK )

HX as distinguishing signs on license plate:

  • Germany: Kreis Hoexter
  • UK: Portsmouth
  • Norway: Lillehammer in the province of Oppland
  • Hungary: Armed Forces ( Magyar Honvédség )

H X is:

  • Horten HX, flying wing single-seat fighter of the Horten brothers
  • Disambiguation
  • Abbreviation