In the contiguous United States and Canada and for some airports in Mexico, most, but not all, airports have been assigned three-letter IATA codes. These are the same as their ICAO code, but without the leading K, C, or M.; e.g., YEG and CYEG both refer to Edmonton International Airport, Edmonton, Alberta; IAD and KIAD are used for Washington Dulles International Airport, Chantilly, Virginia; and MEX and MMEX were originally used for Mexico City International Airport, Mexico City, Distrito Federal (the latter code would be replaced with MMMX after the airport opened). These codes are not to be confused with radio or television call signs, even though both countries use four-letter call signs starting with those letters. However, because Alaska, Hawaii, and United States territories have their own 2-letter ICAO prefix (i.e. "PA" for Alaska, "PH" for Hawaii"), the situation there is similar to other smaller countries and the ICAO code of their airports is typically different from its corresponding 3-letter FAA/IATA identifier. For example, Kona International Airport (PHKO vs KOA) and Juneau International Airport (PAJN vs JNU). Notably, the ICAO code of the largest gateway to Hawaii, Daniel K. Inouye International Airport, also known by its former name, Honolulu International Airport, contains the IATA identifier PHNL (IATA: HNL), while Anchorage International Airport's ICAO code does the same: PANC (IATA: ANC).