Belgian owned and operated aircraft are identified by either registration letters

Aircraft registration

An aircraft registration is a unique alphanumeric string that identifies a civil aircraft, in similar fashion to a licence plate on an automobile...

 or serial numbers for military aircraft.

Civil aircraft

An aircraft registration

Aircraft registration

An aircraft registration is a unique alphanumeric string that identifies a civil aircraft, in similar fashion to a licence plate on an automobile...

 is a unique alphanumeric string that identifies a civil aircraft, in similar fashion to a licence plate on an automobile. In accordance with the Convention on International Civil Aviation all aircraft must be registered with a national aviation authority and they must carry proof of this registration in the form of a legal document called a Certificate of Registration at all times when in operation.

1913 allocation

The first use of aircraft registrations was based on the radio callsigns allocated at the London International Radiotelegraphic Conference in 1913. The format was a single letter prefix followed by four other letters (like A-BCDE). The major nations operating aircraft were allocated a single letter prefix but minor countries had to share a single letter prefix but were allocated exclusive use of the first letter of the suffix. Belgium was not considered a major operator of aircraft and was allocated the prefix and first letter suffix O-B. When the conference allocated the same prefix it made sure that they were in different parts of the world, the other user of the O prefix was Peru and they were allocated O-P. The first allocation was O-BEBE to a Fokker D.VII on 1 March 1920.

1928 allocation

Following the allocation of radio callsigns to Belgium of ON, OO, OP, OQ, OR, OS and OT at the 1927 International Radio-Telegraph Conference. The callsign allocation did not align with those allocated for aircraft registrations and in 1928 the International Convention of Air Navigation re-allocated the aircraft registration prefix to align with the callsigns. Belgian could use all or any letter groups that had been allocated as radio callsigns and in 1929 the prefix OO was selected. The first allocation was OO-AJT to a Stampe et Vertongen RSV 26 in March 1929 and the format was still in use in 2011.

Use

Some of the blocks of registrations have had a reserved usage and these include:

• OO-BAA to OO-BZZ used mainly for balloons
• OO-CAA to OO-CZZ used for the Belgian Congo 1934-1960
• OO-YAA to OO-ZZZ used mainly for gliders
• OO-001 to OO-499 used for homebuild aircraft

Belgian Congo

The Belgian Government issued registration for civil aircraft used in the Belgian Congo

Belgian Congo

The Belgian Congo was the formal title of present-day Democratic Republic of the Congo between King Leopold II's formal relinquishment of his personal control over the state to Belgium on 15 November 1908, and Congolese independence on 30 June 1960.-Congo Free State, 1884–1908:Until the latter...

 and from April 1934 used OO-CAA to OO-CZZ. The allocation
ceased in 1960 with independence and the allocation of the prefix 90.

Military aircraft

Belgian Air Force

When the Belgian Air Force

Belgian Air Force

The Air Component, formerly the Belgian Air Force, is the air arm of the Belgian Armed Forces. Originally founded in 1909, it is one of the world's first air forces, and was a pioneer in aerial combat during the First World War...

 was re-formed in 1946 individual aircraft were allocated serial numbers in either a one or two letter prefix followed by a one or two digit number. The first allocations were mainly single letters (for example A-1 was an Auster AOP.6

Auster AOP.6

-Bibliography:*Halley, J.J., The Squadrons of the Royal Air Force & Commonwealth 1918-1988, Air-Britain, Tonbridge, ISBN 0-85130-164-9....

) but sometimes a second letter was used to distinguish variants, for example NA-1 was an Avro Anson I

Avro Anson

The Avro Anson is a British twin-engine, multi-role aircraft that served with the Royal Air Force, Fleet Air Arm and numerous other air forces prior to, during, and after the Second World War. Named for British Admiral George Anson, it was originally designed for maritime reconnaissance, but was...

 and NB-1 was an Anson II.

Designation	Aircraft	Notes
A-	Auster AOP.6 Auster AOP.6 -Bibliography:*Halley, J.J., The Squadrons of the Royal Air Force & Commonwealth 1918-1988, Air-Britain, Tonbridge, ISBN 0-85130-164-9....
C-	Airspeed Consul Airspeed Consul -See also:-References:...
C	de Havilland Canada Chipmunk
D	de Havilland Dominie
G	Miles Magister Miles Magister -See also:-References:NotesBibliography* Amos, Peter. Miles Aircraft = The early years. Tonbridge: Air-Britain, 2009. ISBN 978 0 85130 410 6...
H	North American Harvard
K	Douglas Dakota	Some aircraft temporary used KP- for photography, KFC- reconnaissance and KR- for VIP transport
O	Airspeed Oxford Airspeed Oxford The Airspeed AS.10 Oxford was a twin-engine aircraft used for training British Commonwealth aircrews in navigation, radio-operating, bombing and gunnery during the Second World War.-Design and development:...
P	Percival Proctor Percival Proctor The Percival Proctor was a British radio trainer and communications aircraft of the Second World War. The Proctor was a single-engine, low-wing monoplane with seating for three or four, depending on the model.-Design and development:...
T	de Havilland Tiger Moth De Havilland Tiger Moth The de Havilland DH 82 Tiger Moth is a 1930s biplane designed by Geoffrey de Havilland and was operated by the Royal Air Force and others as a primary trainer. The Tiger Moth remained in service with the RAF until replaced by the de Havilland Chipmunk in 1952, when many of the surplus aircraft...
V	Stampe SV-4 Stampe SV.4 -Bibliography:* Pacco, John. "Stampe & Vertongen SV-4B" Belgisch Leger/Armee Belge: Het Militair Vliegwezen/l'Aeronautique Militaire 1930-1940. Aartselaar, Belgium, 2003, pp. 85-86. ISBN 90-801136-6-2....	SV-4B and SV-4C
ED	GLoster Meteor T.7 Gloster Meteor The Gloster Meteor was the first British jet fighter and the Allies' first operational jet. It first flew in 1943 and commenced operations on 27 July 1944 with 616 Squadron of the Royal Air Force...
EF	GLoster Meteor F.4 Gloster Meteor The Gloster Meteor was the first British jet fighter and the Allies' first operational jet. It first flew in 1943 and commenced operations on 27 July 1944 with 616 Squadron of the Royal Air Force...
EG	Gloster Meteor F.8 Gloster Meteor The Gloster Meteor was the first British jet fighter and the Allies' first operational jet. It first flew in 1943 and commenced operations on 27 July 1944 with 616 Squadron of the Royal Air Force...
EN	Gloster Meteor NF.11 Gloster Meteor The Gloster Meteor was the first British jet fighter and the Allies' first operational jet. It first flew in 1943 and commenced operations on 27 July 1944 with 616 Squadron of the Royal Air Force...
ID	Hawker Hunter F.4 Hawker Hunter The Hawker Hunter is a subsonic British jet aircraft developed in the 1950s. The single-seat Hunter entered service as a manoeuvrable fighter aircraft, and later operated in fighter-bomber and reconnaissance roles in numerous conflicts. Two-seat variants remained in use for training and secondary...
IF	Hawker Hunter F.6 Hawker Hunter The Hawker Hunter is a subsonic British jet aircraft developed in the 1950s. The single-seat Hunter entered service as a manoeuvrable fighter aircraft, and later operated in fighter-bomber and reconnaissance roles in numerous conflicts. Two-seat variants remained in use for training and secondary...
MA	de Havilland Mosquito TT.3 De Havilland Mosquito The de Havilland DH.98 Mosquito was a British multi-role combat aircraft that served during the Second World War and the postwar era. It was known affectionately as the "Mossie" to its crews and was also nicknamed "The Wooden Wonder"...
MB	de Havilland Mosquito NF.30 De Havilland Mosquito The de Havilland DH.98 Mosquito was a British multi-role combat aircraft that served during the Second World War and the postwar era. It was known affectionately as the "Mossie" to its crews and was also nicknamed "The Wooden Wonder"...
MC	de Havilland Mosquito TT6 De Havilland Mosquito The de Havilland DH.98 Mosquito was a British multi-role combat aircraft that served during the Second World War and the postwar era. It was known affectionately as the "Mossie" to its crews and was also nicknamed "The Wooden Wonder"...
NA	Avro Anson 1 Avro Anson The Avro Anson is a British twin-engine, multi-role aircraft that served with the Royal Air Force, Fleet Air Arm and numerous other air forces prior to, during, and after the Second World War. Named for British Admiral George Anson, it was originally designed for maritime reconnaissance, but was...
NB	Avro Anson 2 Avro Anson The Avro Anson is a British twin-engine, multi-role aircraft that served with the Royal Air Force, Fleet Air Arm and numerous other air forces prior to, during, and after the Second World War. Named for British Admiral George Anson, it was originally designed for maritime reconnaissance, but was...
SG	Supermarine Spitfire XIV Supermarine Spitfire The Supermarine Spitfire is a British single-seat fighter aircraft that was used by the Royal Air Force and many other Allied countries throughout the Second World War. The Spitfire continued to be used as a front line fighter and in secondary roles into the 1950s...
SM	Supermarine Spitfire IX Supermarine Spitfire The Supermarine Spitfire is a British single-seat fighter aircraft that was used by the Royal Air Force and many other Allied countries throughout the Second World War. The Spitfire continued to be used as a front line fighter and in secondary roles into the 1950s...

In the 1950s the first letter started to be used as a role prefix, for example FX-01 was a Lockheed F-104G Starfighter
classified as a Fighter.

Designation	Aircraft	Notes
AT	Dornier-Dassault Alpha Jet
AX	Avro-Canada CF-100
BA	Dassault Mirage 5BA Dassault Mirage 5 The Dassault Mirage 5 is a supersonic attack aircraft designed in France by Dassault Aviation during the 1960s, and manufactured in France and a number of other countries. It was derived from Dassault's popular Mirage III fighter, and spawned several variants of its own.-Early development:The...	First aircraft used the serial MA-01 later changed to BA-01
BD	Dassault Mirage 5BD Dassault Mirage 5 The Dassault Mirage 5 is a supersonic attack aircraft designed in France by Dassault Aviation during the 1960s, and manufactured in France and a number of other countries. It was derived from Dassault's popular Mirage III fighter, and spawned several variants of its own.-Early development:The...	First aircraft used the serial MD-01 later changed to BD-01
BR	Dassault Mirage 5BR Dassault Mirage 5 The Dassault Mirage 5 is a supersonic attack aircraft designed in France by Dassault Aviation during the 1960s, and manufactured in France and a number of other countries. It was derived from Dassault's popular Mirage III fighter, and spawned several variants of its own.-Early development:The...
CA	Airbus A310 Airbus A310 The Airbus A310 is a medium- to long-range twin-engine widebody jet airliner. Launched in July 1978, it was the second aircraft created by Airbus Industrie,a consortium of European aerospace companies, Airbus is now fully owned by EADS and since 2001 has been known as Airbus SAS. the consortium of...
CB	Boeing 727 Boeing 727 The Boeing 727 is a mid-size, narrow-body, three-engine, T-tailed commercial jet airliner, manufactured by Boeing. The Boeing 727 first flew in 1963, and for over a decade more were built per year than any other jet airliner. When production ended in 1984 a total of 1,832 aircraft had been produced...
CD	Dassault Falcon 900
CE	Embraer 135
CF	Swearingen Merlin III
CH	Lockheed C-130 Hercules
CM	Dassault Falcon 20 Dassault Falcon 20 The Dassault Falcon 20 is a French business jet and was the first of a family of business jets built by Dassault Aviation.-Design and development:...
CP	Fairchild C-119 Flying Boxcar
CS	Hawker Siddeley 748
FA	General Dynamics F-16A
FB	General Dynamics F-16B
FC	Lockheed TF-104G Starfighter
FR	Republic RF-84F Thunderflash
FS	Republic F-84E Thunderjet
FT	Lockheed T-33A
FU	Republic F-84F Thunderstreak
FX	Lockheed F-104G Starfighter
FZ	Republic F-84G Thunderjet
KX	Douglas DC-4 Douglas DC-4 The Douglas DC-4 is a four-engined propeller-driven airliner developed by the Douglas Aircraft Company. It served during World War II, in the Berlin Airlift and into the 1960s in a military role...
KY	Douglas DC-6 Douglas DC-6 The Douglas DC-6 is a piston-powered airliner and transport aircraft built by the Douglas Aircraft Company from 1946 to 1958. Originally intended as a military transport near the end of World War II, it was reworked after the war to compete with the Lockheed Constellation in the long-range...
LB	Piper Super Cub	L-21C air cadet glider tugs
MT	Fouga Magister Fouga Magister The Fouga Magister is a 1950s French two-seat jet trainer. The related CM.175 Zéphyr was a carrier-capable version for the French Navy....
RM	Percival Pembroke Percival Pembroke -See also:-Bibliography:* The Illustrated Encyclopedia of Aircraft London: Orbis Publishing, 1985.* Jackson, A.J. British Civil Aircraft since 1919 . London: Putnam, 1974. ISBN 0-370-10014-X....
RS	Westland Sea King Westland Sea King The Westland WS-61 Sea King is a British licence-built version of the American Sikorsky S-61 helicopter of the same name, built by Westland Helicopters. The aircraft differs considerably from the American version, with Rolls-Royce Gnome engines , British made anti-submarine warfare systems and a...
ST	SIAI SF.260

An Aero Commander 560F was operated for royal flights between 1961 and 1973 without a serial number but display its radio callsign OT-CWB instead.

Belgian Army

In 1954 the Belgian Army formed its own aviation element and serial numbers were allocated in the for OL-A01, the OL for Observation Leger (light observation), the letter for the type and the number for each individual aircraft. In 1974 the OL prefix was dropped.

Designation	Aircraft	Notes
A	Sud Alouette II
B	Britten-Norman Islander Britten-Norman Islander The Britten-Norman BN-2 Islander is a 1960s British light utility aircraft, regional airliner and cargo aircraft designed and originally manufactured by Britten-Norman of the United Kingdom. The Islander is one of the best-selling commercial aircraft types produced in Europe. Although designed in...
D	Dornier Do 27 Dornier Do 27 -See also:-Bibliography:*Green, William. Macdonald Aircraft Handbook. London. Macdonald & Co. Ltd., 1964.*Jackson, Paul A. German Military Aviation 1956-1976. Hinckley, Leicestershire, UK: Midland Counties Publications, 1976. ISBN 0-904597-03-2.-External links:**...
G	Aerospatiale Puma Aérospatiale Puma The Aérospatiale SA 330 Puma is a four-bladed, twin-engined medium transport/utility helicopter. The Puma was originally manufactured by Sud Aviation of France.-Development:...
H	Agusta A.109
L	Piper Super Cub	L-18C

Belgian Navy

The Belgian Navy have operated a number of shipborne helicopters which were allocated serials with single letter prefix although the radio callsigns were also painted on the aircraft in a similar format to registrations.

Designation	Aircraft	Notes
B	Sikorsky S-58
M	Sud Alouette III Aérospatiale Alouette III The Aérospatiale Alouette III is a single-engine, light utility helicopter developed by Sud Aviation. It was manufactured by Aérospatiale of France, and under licence by Hindustan Aeronautics Limited in India as Hal Chetak and Industria Aeronautică Română in Romania.The Alouette III is the...

Police

The Belgian Gendarmerie and later the Federal Police

Federal Police (Belgium)

The Federal Police carry out specialized police and investigation missions that cover more than one region in Belgium. The federal police have approximately 12,500 personnel that provide support units for the local police and the federal police itself....

 have operated both fixed-wing aircraft and helicopters which carry serial numbers prefixed G with individual aircraft identified by increasing numbers. The first was an Aerospatiale Puma

Aérospatiale Puma

The Aérospatiale SA 330 Puma is a four-bladed, twin-engined medium transport/utility helicopter. The Puma was originally manufactured by Sud Aviation of France.-Development:...

G01