YokoTsuno
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Country Code In AC Registration Numbers

Sat Apr 30, 2011 11:18 am

Why is the country code in the aircraft registration number so odd? Germany and Vietnam for instance have a D respectively VN, which still makes sense, but what about the N and G for the US, UK.
 
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Starlionblue
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Country Code In AC Registration Numbers

Sat Apr 30, 2011 11:31 am

G is probably for "Great Britain". Don't know why US has "N".
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
David L
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Country Code In AC Registration Numbers

Sat Apr 30, 2011 11:36 am

Quoting YokoTsuno (Thread starter):
but what about the N and G for the US, UK.

"G" for Great Britain? A different system in the USA because there are so many aircraft registered there? I don't know why "N" was chosen.
 
26point2
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Country Code In AC Registration Numbers

Sat Apr 30, 2011 12:55 pm

USA used NA and NC prior to N. .
 
Northwest727
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Country Code In AC Registration Numbers

Sat Apr 30, 2011 1:33 pm

Quoting 26point2 (Reply 3):
USA used NA and NC prior to N. .

Prior to the 1950s or so, the second letter was to denote the category of aircraft. NC was a standard aircraft, NL was a limited aircraft, NR was a restricted aircraft, and NX was a experimental aircraft. At some point, the second letter was dropped, since it wasn't actually part of the registration anyways (ie, NC-54321 is the same as N54321) Older antique aircraft are still able to display older registrations like this, thanks to 14 CFR 45.22.

Edit: wikipedia has a good article on this:

http://en.wikipedia.org/wiki/Aircraft_registration#United_States

[Edited 2011-04-30 06:35:35]
 
YokoTsuno
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Country Code In AC Registration Numbers

Sat Apr 30, 2011 10:38 pm

Quoting Starlionblue (Reply 1):
G is probably for "Great Britain".

I expected it to me more in line with the country codes used for other purposes like GB or UK. Some are even more off. KOR,KO, or KR is generally used for Korea but for aircraft registration it suddenly becomes HL. This looks totally random to me.
http://en.wikipedia.org/wiki/Country...des:_J%E2%80%93K#.C2.A0South_Korea

Quoting Northwest727 (Reply 4):
Edit: wikipedia has a good article on this:

I read this article before my post. It explains a lot but it does not really say where these codes came from.
 
Viscount724
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Country Code In AC Registration Numbers

Sun May 01, 2011 12:23 am

 
BMI727
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Country Code In AC Registration Numbers

Sun May 01, 2011 12:24 am

Quoting Starlionblue (Reply 1):
Don't know why US has "N".

It stands for Navy. Many of the country codes used to register aircraft were based on the codes for radio callsigns. Since one of the major early users of radio sets was the US Navy, they got N allocated as a prefix for US radios. Then it was transferred to aircraft.

Also, for many years airport codes beginning with N were reserved for Naval Air Stations. which is part of how Newark got EWR, New Orleans got MSY, etc.
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Northwest727
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Country Code In AC Registration Numbers

Sun May 01, 2011 5:44 pm

Quoting BMI727 (Reply 7):
It stands for Navy. Many of the country codes used to register aircraft were based on the codes for radio callsigns. Since one of the major early users of radio sets was the US Navy, they got N allocated as a prefix for US radios. Then it was transferred to aircraft.

Also, for many years airport codes beginning with N were reserved for Naval Air Stations. which is part of how Newark got EWR, New Orleans got MSY, etc.

Well, I'll be damned. I never knew nor did it seem like anyone else knew of the origin of the "N" in the USA's registration number. Certainly learn something everyday.
 
COSPN
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Country Code In AC Registration Numbers

Mon May 02, 2011 12:42 pm

YokoTsuno


Hangul: 대한민국 is the name of Korea in Korean so HL makes some sense...
 
Asturias
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Country Code In AC Registration Numbers

Mon May 02, 2011 11:51 pm

No idea why Spain has EC, Norway has LN or Iceland TF. I realize it comes from radio callsigns, but the origin seems arbitrary.

asturias
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Starlionblue
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Country Code In AC Registration Numbers

Tue May 03, 2011 6:48 am

Quoting Asturias (Reply 10):
No idea why Spain has EC, Norway has LN or Iceland TF. I realize it comes from radio callsigns, but the origin seems arbitrary.

Well, "E" in "EC" could stand for España. "N" in "LN" could stand for Norge.

Finland has "OY". Also a bit odd.
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
bond007
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Country Code In AC Registration Numbers

Tue May 03, 2011 7:21 am

Quoting Asturias (Reply 10):
No idea why Spain has EC, Norway has LN or Iceland TF. I realize it comes from radio callsigns, but the origin seems arbitrary.

EC is for Espana Civil.

Jimbo
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Asturias
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RE: Country Code In AC Registration Numbers

Wed May 04, 2011 9:46 pm

Quoting bond007 (Reply 12):
EC is for Espana Civil.

Makes sense, thanks  
Quoting Starlionblue (Reply 11):
"N" in "LN" could stand for Norge.

Finland has "OY". Also a bit odd.

Indeed, the N could stand for Norge, but the L is quite confusing. The TF of Iceland contains no apparent connection to the name of the country, nor does OY for Finland, as you point out.

Probably arbitrary.

asturias
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YokoTsuno
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RE: Country Code In AC Registration Numbers

Thu May 05, 2011 1:33 pm

I think I resolved a bit of the puzzle. The aircraft codes seem to be either one group or the full group of the ITU radio transmitter prefixes. Possible that in the early days of aviation they sort of looked at airplanes as "flying radio transmitters" and reserved one group for airplanes.

http://en.wikipedia.org/wiki/ITU_prefix

That still doesn't tell where the ITU radio transmitter codes come from.

E.g
AC Reg / ITU prefix

Korea HL / HLA to HLZ
Spain EC / EA to EH
Japan JA / JA to JZ
US N / NA to NZ
Finland OH / OF to OJ
Singapore 9V / 9VA to 9VZ
Finland OH /OF to OJ
Germany D / D
Belgium OO / ON to OT
 
KELPkid
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RE: Country Code In AC Registration Numbers

Thu May 05, 2011 6:10 pm

In general-

This is one of the limitations of trying to represent a world with over 200 countries using an alphabet of 26 characters   Yes, you will end up with some oddballs, and find out that there's not enough characters to go around...and figure out that obscure treaties of the early 20th century on radios, telephony, and the like had quite a bit of input into the subject  
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larshjort
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RE: Country Code In AC Registration Numbers

Thu May 05, 2011 6:37 pm

Quoting Starlionblue (Reply 11):
Finland has "OY". Also a bit odd.
Quoting Asturias (Reply 13):
Indeed, the N could stand for Norge, but the L is quite confusing. The TF of Iceland contains no apparent connection to the name of the country, nor does OY for Finland, as you point out.

Just a minor correction, OY is Denmark. Finland is OH.

I do know that up until the late twenties, the danish registration prefix was T-.

/Lars
139, 306, 319, 320, 321, 332, 34A, AN2, AT4, AT5, AT7, 733, 735, 73G, 738, 739, 146, AR1, BH2, CN1, CR2, DH1, DH3, DH4,
 
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Starlionblue
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RE: Country Code In AC Registration Numbers

Thu May 05, 2011 11:16 pm

Quoting larshjort (Reply 16):
Just a minor correction, OY is Denmark. Finland is OH.

Oops! Sorry.
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
KELPkid
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RE: Country Code In AC Registration Numbers

Fri May 06, 2011 12:39 am

Quoting Starlionblue (Reply 17):
Oops! Sorry.

Don't you mean "Oy!"    
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Asturias
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RE: Country Code In AC Registration Numbers

Sat May 07, 2011 9:58 pm

Quoting larshjort (Reply 16):
Just a minor correction, OY is Denmark. Finland is OH.

Thanks for the correction!  

asturias
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