kaitak
Posts: 8951
Joined: Wed Aug 18, 1999 5:49 am

Icao Hex Code

Wed Jan 13, 2010 6:16 pm

I have been using a superb new site (well, new to me!) called Radarvirtuel, which is excellent for European flights. However, when you click on an aircraft, one of the pieces of data it gives you is the ICAO Hex Code. Can anyone tell me what this is and what is means? Who assigns it and is it specific to the acft itself?

Thanks for any info!

http://www.radarvirtuel.com/
 
FredT
Posts: 2166
Joined: Thu Feb 07, 2002 9:51 pm

RE: Icao Hex Code

Wed Jan 13, 2010 6:41 pm

A unique 24 bit code assigned to each aircraft equipped with a mode S transponder. That's effectively the ID of the aircraft. Haven't heard of it being called the ICAO code before, but then again it's not something I work with. Has to be the same.
I thought I was doing good trying to avoid those airport hotels... and look at me now.
 
kaitak
Posts: 8951
Joined: Wed Aug 18, 1999 5:49 am

RE: Icao Hex Code

Wed Jan 13, 2010 8:59 pm

Thanks Fred!

Kaitak
 
aviopic
Posts: 2423
Joined: Sat Mar 13, 2004 7:52 pm

RE: Icao Hex Code

Wed Jan 13, 2010 9:04 pm



Quoting Kaitak (Thread starter):
one of the pieces of data it gives you is the ICAO Hex Code.

This might be useful for you.
http://en.wikipedia.org/wiki/Aviation_transponder_interrogation_modes
http://www.mantma.co.uk/icao%20allocations.html
The truth lives in one’s mind, it doesn’t really exist
 
User avatar
zeke
Posts: 9855
Joined: Thu Dec 14, 2006 1:42 pm

RE: Icao Hex Code

Thu Jan 14, 2010 11:00 am



Quoting Kaitak (Thread starter):
Can anyone tell me what this is and what is means?

The extended mode s transponder 24 bit address that transmitted on the long and short squitters by the aircraft mode s transponder.

Quoting Kaitak (Thread starter):
Who assigns it and is it specific to the acft itself?

The state of registration. The first 4 to 14 bits define the state of registry, the remaining 10-20 bits is the unique part of the address, and identified that aircraft registration in the state of registry.

Similar to how aircraft in the UK start their registration with "G", and then have unique letter after the -, like G-CIVA.
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oly720man
Posts: 5743
Joined: Fri May 21, 2004 7:13 am

RE: Icao Hex Code

Thu Jan 14, 2010 11:16 am

Beware that on sites like this, though the aircraft info may be accurate the flight routing may be dodgy. Today, for example it has US9195 as routing DUB-PHL, but it left MAN, having diverted in from LGW as US732 yesterday.

It's showing over the sea to the west of Northern Ireland at the moment.
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