Airline Coding Directory (ACD)

Official industry source for airline designators, three-digit airline numeric codes and location identifiers. Published twice a year with effective dates June 1st and December 1st.

The Directory also includes ISO currency, country codes, lists contacts for minimum connecting time, coordinators and airlines applying reconfirmation procedures and, as of this year, the Numeric Location Type Code.

The airline designators and location identifiers are also available electronically, in ASCII format, via a web download (one-time download) or via a 12-month subscription with daily updates, accessible via a web download.