Which statement correctly pairs a country with its ICAO prefix?

Which statement correctly pairs a country with its ICAO prefix?

• A. Canada – C; United States – K
• B. Canada – K; United States – C
• C. Canada – EG; United Kingdom – EI
• D. Ireland – EI; United States – K

Answer: (A)

ICAO airport prefixes are the first part of the four-letter airport code that indicate the country. In North America, the United States uses the prefix K (think KLAX, KJFK), while Canada uses the prefix C (think CYVR, CYYZ). So pairing Canada with C and the United States with K fits this naming system. It’s helpful to see examples: Canadian airports typically start with C, and U.S. airports with K. This is different from aircraft registration prefixes, where the United States uses N. Other regions have different prefixes (the United Kingdom uses EG for many airports, Ireland uses EI), but the given pairing matches the standard airport-code convention.