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oups.com...

Some airport identifiers begin with a letter while others begin with a
number. What's the difference?


It's all explained he

http://www.faa.gov/atpubs/LID/CH1.htm#1-2-7



A nearby airport changed from 1F9 to XBP. I would assume that there is
a cost associated with such a change. What is the reason for this
change that outweighs all the costs? As far as I know there is no
change at the airport.

http://www.airnav.com/airport/KXBP

I searched the web but did not find an answer, that made me even more
curious.


How long has the field had the AWOS?