Andrew Sarangan wrote:
It is most likely due to a a weather station being installed at the
airport. I believe ICAO does not allow numbers in airport codes.

Canandaigua has an AWOS, but its code is D38. However the AWOS does not
get reported if you ring flight service, or look up the METARS on ADDS.
Saratoga, NY 5B3 is another example of this.




Matt Whiting wrote:

Is anyone aware of a source for changes in airport identifiers? I flew
into Hilton Head twice years ago and the first time I listed the ID as
49J and the second time as HXD. The first flight was in 1994 and the
second in 1996. I did a decode on 49J and it shows as a non-existent
identifier. HXD is current for Hilton Head. I found a few sites that
say the ID changed with airline service was added, but I've not found
any site that contains such history in general.

Matt