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Airport ICAO in same country with different prefix

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What instances are there of airports in same country having different ICAO first letter?

For one Alaska and Hawaii come to mind where code starts with P than K. Any particular reason for this, were they afraid of running out of codes?

"P" codes indicate the Pacific, "K" codes are the continental US, Some codes like "TJSJ" are ambiguous since Puerto Rico is a US protectorate in the Carribean.Basically, the codes have regional meaning as well as national meaning. US domestic flights are more likely to use ATA codes than ICAO codes - look at your luggage tags here in the US when you fly city to city.

DJ

ICAO codes would be what you find in flight plans and ATC stuff. IATA codes would be what the passengers are looking at on luggage tags, airline websites, and what not.

Captain Kevin

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