Swiss HB registrations: format, classes and quirks

On the observation deck in Zurich, an A320 taxis past, red tail, Swiss cross, HB-JL… on the fuselage – and two minutes later an Embraer with HB-AZ…, also with an LX flight number. If you can read Swiss HB registrations, you not only tell the two apart but also recognize whether a light aircraft, a helicopter or a vintage aircraft is rolling across the runway. This guide explains the format, the meaning of the first letter after HB-, the special cases of gliding and Liechtenstein, and where the prefix comes from in the first place.

HB registrations: the short answer

A Swiss aircraft registration consists of the nationality mark HB, a hyphen and the registration mark. For airplanes, helicopters and balloons these are three letters, such as HB-JNA. Gliders and motor gliders carry digits instead. The first letter after the hyphen gives a hint about the kind of aircraft – J, for example, stands for large aircraft, X for helicopters.

The authority responsible is the Federal Office of Civil Aviation (BAZL). It keeps the aircraft register, reserves registrations and enters the aircraft. What the marks on the aircraft look like and where they are applied (in general: Where the registration has to be on an aircraft) is governed by the BAZL Ordinance on Aircraft Markings (VKZ). The international basis is – as everywhere – the Chicago Convention. How this system works worldwide is explained in the basics guide Understanding aircraft registrations.

What the first letter after HB- tells you

Unlike in Germany, where the letter after D- denotes a firmly defined weight class (see German registrations and weight classes), the Swiss system grew historically. The letters group aircraft by size, propulsion and sometimes even by manufacturer. When a range was used up, a new letter was opened. The following overview summarizes the common assignment as described in reference works:

Group	Typical aircraft	What you see at the fence
HB-I, HB-J	aircraft over 15 tonnes	airliners of SWISS, Edelweiss, Chair; historically Swissair
HB-A	originally twin-engine turboprops between 5.7 and 15 tonnes, since 2019 other airliners too	Helvetic’s Embraer E2 (HB-AZ…)
HB-V	business jets under 15 tonnes	business aviation in Geneva, Zurich, Lugano
HB-F, HB-H	aircraft built in Switzerland, such as those by Pilatus	PC-6, PC-12 and trainers from Stans
HB-C, HB-T	single-engine Cessnas under 5.7 tonnes	flight schools, regional airfields
HB-P, HB-N, HB-O	single-engine Pipers	general aviation
HB-K, HB-D, HB-E, HB-S, HB-U	other single-engine aircraft under 5.7 tonnes	Robin, Socata, Beech, two-seaters
HB-G, HB-L	twin-engine aircraft under 5.7 tonnes	touring and training aircraft
HB-M	aerobatic aircraft	airshows, aerobatic training
HB-R	historic and special aircraft	vintage aircraft such as the Super Constellation HB-RSC
HB-X, HB-Z	helicopters	rescue, utility and sightseeing helicopters
HB-B, HB-Q	hot-air and gas balloons	balloon festivals, Alpine crossings
HB-Y	experimental and homebuilt aircraft	small airfields
HB-W	ecolight aircraft	light sport aircraft

Important in practice: this table is a reading aid, not a legal norm. Older aircraft keep their registration even if the assignment practice changes later, and individual letters were extended as needed. If a registration does not seem to fit the aircraft, that is therefore not automatically a misreading. The final proof comes from the register. How to find individual aircraft by registration is shown in the guide Tracking an aircraft by registration.

HB-I and HB-J: the airliner series

For airline spotters the J series is the most important range. Large aircraft first ran under HB-I, and many jets from the Swissair era carried this series. When the combinations ran short, it continued with HB-J. That is why SWISS flies mostly with HB-J… today: the airline’s first Boeing 777-300ER, HB-JNA, landed in Zurich on January 29, 2016. The first CS100, now known as the Airbus A220-100, carried HB-JBA, and the first A321neo arrived in September 2020 as HB-JPA.

Interesting: on the most recent long-haul jets the I series is back. The A350-900s of Edelweiss run under HB-IH…, such as HB-IHC, and SWISS took delivery of its first A350-900 as HB-IFA in October 2025. For your collection this means: HB-I is not automatically a vintage aircraft from Swissair days.

Family patterns within a fleet also help with reading. At SWISS the second and third letters often stand for a type family, such as HB-JM… on the A340-300s, of which only a few are still in service as of October 2026. That is not a fixed rule, though – rely on type and register rather than a pattern.

HB-A: regional jets and more

Originally HB-A was intended for medium-sized twin-engine turboprops. Meanwhile other airliners are registered there too. The best example is Helvetic Airways: its Embraer E190-E2s, the first of which the airline took over at the end of October 2019, carry registrations such as HB-AZE or HB-AZG. So if you see a jet with HB-AZ… on an LX flight, you are as a rule looking at a Helvetic aircraft flying for SWISS.

Gliders, balloons and helicopters

Not every Swiss aircraft carries letters. Gliders and motor gliders get a running number after HB-. For motor gliders the range HB-2000 to HB-2999 is provided; gliders skip this block. According to overviews, ecolight motor gliders have a series of their own starting at HB-5500. A registration like HB-3… therefore tells you right away that you are not looking at a powered aircraft – even if the glider is just hanging in tow behind a Robin.

You find balloons under HB-B and, when that range was used up, under HB-Q. Especially at balloon festivals it is worth a look at the envelope or the basket: the registration is often large and easy to read there.

Helicopters classically fall under HB-X, supplemented by HB-Z. In a country with so many rescue, transport and utility missions in the mountains, they are a collecting area of their own. The air rescue service Rega (Swiss Air Rescue) and operators such as Air Zermatt show how varied the scene is. Not all newer helicopters follow the X rule, however – here too: cross-check type and register.

Swiss manufacturers: HB-F and HB-H

A Swiss peculiarity is dedicated letters for aircraft of domestic production. Under HB-F and HB-H you find types built in Switzerland, above all types from Pilatus Aircraft of Stans: the Pilatus PC-6 Porter, the PC-12 or trainers such as the PC-7 and PC-21. Many Pilatus aircraft leave Switzerland quickly, however, and then fly with the registration of their country of destination. A PC-12 with an HB registration is therefore more common at its home airfield than in Frankfurt or Hamburg.

The group HB-V is intended for business jets under 15 tonnes. Whether a Swiss-registered jet such as the Pilatus PC-24 runs under HB-V or under a manufacturer letter is revealed in each case by the register. Geneva, with its strong business aviation, is a good place for that; an overview of the airport is in the profile of Geneva Airport.

HB-R: vintage aircraft and special cases

The group HB-R is reserved for historic and special aircraft – for many spotters the most exciting series. The best-known example is the Basel-based Lockheed Super Constellation HB-RSC, which, however, has been grounded for years because of corrosion damage. If you would rather view Swiss aviation history in peace, you will find it in the Swiss Museum of Transport (Verkehrshaus) in Lucerne or in the Swiss Air Force Museum (Flieger-Flab-Museum) in Dübendorf. Aircraft with historic registrations are on display there too, whose former owners have long ceased to exist – such as Swissair (1931–2002) or Crossair (1975–2002).

Liechtenstein: HB with a different coat of arms

The Principality of Liechtenstein does not use an aircraft prefix of its own. The BAZL also keeps the Liechtenstein aircraft register, and basically the same rules apply there as in Switzerland. Liechtenstein aircraft therefore also carry HB registrations. According to common overviews, the difference is made by the national insignia: instead of the Swiss cross, the aircraft shows the coat of arms of Liechtenstein.

For spotters that is a nice trap: an HB registration does not necessarily prove a Swiss registration. If you want to know for sure, check the entry in the register or look at the national insignia on the aircraft.

Where does the HB prefix come from?

Until the 1930s, Swiss aircraft carried CH plus a number. The prefix HB arrived with the revised Paris Convention on air navigation; Switzerland acceded to it on October 1, 1934. The letters come from the international radio call sign system: the Washington radiotelegraph convention of 1927 had already allocated the block HBA to HBZ to Switzerland.

Why it ended up being HB is not clearly documented. A common assumption is that Switzerland moved to an H block because CH lay in Canada’s letter range. Popular explanations such as “Helvetic Confederation” or spotter quips such as “High Mountains” are nice mnemonics but not a documented origin. More on the logic behind the prefixes of all countries is in the guide to aircraft country codes.

Assignment, reservation and reassignment

Registrations are assigned by the BAZL. Anyone who wants a specific registration can apply for it via a reservation request to the aircraft register. The entry itself requires, among other things, that the ownership requirements are met. For processing a complete application, the BAZL generally cites around ten working days.

Especially important for collectors: for a long time in Switzerland, every registration was assigned only a single time. Since 2023, registrations that were deleted more than ten years ago can be assigned again. According to overviews, registrations of aircraft lost in fatal accidents are excluded. A letter sequence can thus designate two different aircraft over the decades – important when you are collecting registrations.

The HB prefix doesn’t reveal the airline

The most common mistake when spotting in Zurich, Geneva or Basel: HB- does not mean SWISS. Besides SWISS, Edelweiss, Helvetic, Chair Airlines and easyJet Switzerland also fly with Swiss registrations. And because Edelweiss and Helvetic aircraft are partly operating on behalf of SWISS, even the flight number does not reliably tell you which aircraft is really in front of you. The difference between flight number, callsign and registration is explained in the article Callsign and flight number.

Conversely, an aircraft can also lose its HB-. If an aircraft moves to a group company in another country or is sold, it gets a new registration. What happens then and how to reflect such changes in your collection is covered in the guide to re-registering aircraft. How Austria solves the same problem is shown by the comparison with the Austrian OE registrations.

Where to collect HB registrations best

You experience the highest density of HB registrations at Zurich Airport, the hub of SWISS and home of Edelweiss and Helvetic. From observation deck B you can often read taxiing aircraft up close, and at Butzenbüel you catch approaches with easily legible fuselage lettering. You will find tips on light direction and daily schedule in the Zurich guide.

In Geneva, easyJet Switzerland, SWISS and a lot of business aviation with HB-V mix. The observation deck at Geneva Airport and the Geneva guide help with planning. At EuroAirport Basel-Mulhouse you meet HB registrations among French F- registrations. For general aviation, helicopters and Pilatus types, regional airfields such as Bern Airport are worthwhile. What you have to keep in mind legally when spotting in Switzerland is summarized in Plane spotting in Switzerland.

Conclusion

Swiss registrations follow a simple basic pattern – HB, hyphen, three letters or a number – with many historically grown subtleties. The first letter is a useful hint about size and kind, but not a rigid weight class as in Germany. HB-J and HB-I stand for the big ones, HB-A now also houses regional jets, HB-X and HB-Z the helicopters, HB-R the vintage aircraft. Liechtenstein shares the prefix, and since 2023 an old letter sequence can get a second life.