Airline callsigns and their history: Speedbird, Shamrock, Dynasty and more

“Speedbird two-one-seven, cleared to land.” If you hear air traffic control radio at an airport for the first time, you stop short at the latest here: which airline is called Speedbird? The answer is British Airways – and behind it lies a story that goes back to 1932. As with Speedbird, many airline callsigns reveal something about logos, predecessor airlines, hometowns or founders. This article shows you how callsigns work, who assigns them and what stories lie behind Speedbird, Shamrock, Dynasty and many others.

What an airline callsign is

Every airline that operates under instrument flight rules needs an unambiguous form of address on the radio. There are two components that belong together: the three-letter ICAO code (for example BAW for British Airways) and the radiotelephony designator, that is, the spoken call word (“Speedbird”). Both are listed in ICAO Document 8585, the worldwide directory of operator designators. Unlike the two-character IATA codes, every ICAO code is assigned to exactly one operator.

The full callsign of a scheduled flight is made up of the call word and a flight identification. In the flight plan and on the live map, you then see something like BAW217; on the radio you hear “Speedbird two-one-seven.” The flight identification can match the flight number on the ticket but doesn’t have to – the difference is explained in detail in the article Callsign vs. flight number. How IATA and ICAO codes are structured in general can be found under IATA and ICAO codes explained.

In Annex 10, ICAO distinguishes three forms of callsign:

• Type A: the aircraft’s registration, typical for private and training aircraft, such as “D-EABC,” spoken using the ICAO phonetic alphabet.
• Type B: the operator’s call word plus the last four characters of the registration.
• Type C: call word plus flight identification – the standard form in scheduled traffic.

How callsigns are assigned

ICAO began assigning operator designators in 1947 – at first two-character, a system the IATA adopted for its own codes. Because the number of airlines grew sharply, ICAO introduced three-letter codes in 1982. After a transition period, they became the official standard in November 1987. Since then, ICAO and IATA codes have gone separate ways: American Airlines, for example, is still AA at the IATA and AAL at ICAO.

An operator usually requests a new call word through the aviation authority of its country. A few principles apply to the choice:

• The call word fits the operator’s name or function where possible.
• It must not be confusable with existing callsigns.
• It must be easy to pronounce, at least in English, the standard language of international air traffic radio. More on that in the article English or German on the radio.

This very balancing act explains many curious callsigns. The obvious airline name is often already taken, sounds too similar to another call word or is too long on the radio. Then people fall back on a symbol, a place or a story.

Speedbird: the world’s most famous callsign

No callsign is as well known among spotters as Speedbird. Its roots lie with Imperial Airways, the British long-haul airline of the interwar period. In 1932, the graphic artist Theyre Lee-Elliott designed a stylized bird emblem in flight for it, and the sculptor Barbara Hepworth created a relief version. The symbol first appeared on posters and luggage tags and, from 1938, also on the bow of the Short Empire flying boats.

When BOAC was formed in 1939, it adopted the bird – on aircraft noses even under the camouflage paint of World War II. From 1950, it moved to the tail, and BOAC used “Speedbird” as its radio callsign. Its short-haul sister British European Airways, by contrast, called itself Bealine – its last flight ran as “Bealine 943.”

In 1974, BOAC and BEA merged into British Airways. The Speedbird returned to the aircraft nose at first but disappeared as a logo in December 1984. The callsign stayed: BA flies internationally as Speedbird to this day, and for domestic flights the airline uses the callsign Shuttle. In 2019, for the company’s centenary, BA brought the emblem back once more on a Boeing 747-400 in BOAC retro livery.

At London Heathrow Airport, you hear Speedbird every minute – for example at Myrtle Avenue, where the aircraft pass low over you on final approach.

Shamrock, Springbok, Clipper: callsigns with symbolic power

Speedbird is not the only call word that picks up a logo or a national symbol.

Shamrock – Aer Lingus. The Irish shamrock has been the trademark of Aer Lingus for decades. In 1965, a large green shamrock came onto the tail, in 1974 a white variant. On the radio, the airline calls itself “Shamrock” with the ICAO code EIN. If you stand at The Mound in Dublin, you hear the call word correspondingly often.

Springbok – South African Airways. South African Airways, founded in 1929 as Union Airways, long carried a springbok as its emblem. The animal disappeared from the tail with the new livery in 1997, but the callsign SPRINGBOK stayed.

Clipper – Pan Am. From 1931, Pan American World Airways called its flying boats “Clipper” – after the fast sailing ships of the 19th century. The first Sikorsky S-40s were named American Clipper, Southern Clipper and Caribbean Clipper. The callsign CLIPPER accompanied the airline until its end in 1991; today it is a piece of aviation history.

Cathay – Cathay Pacific. Here the call word is part of the name, but the story lies in the word itself: “Cathay” is an old name for China. Cathay Pacific was founded in Hong Kong in 1946; “Pacific” stood for founder Roy Farrell’s hope of one day flying across the Pacific.

Dynasty: China Airlines’ callsign

China Airlines is Taiwan’s national airline. Its name reflects the official state name Republic of China; it was founded in 1959 with two PBY amphibious aircraft. The ICAO code is CAL, the callsign DYNASTY.

According to our research, the airline has not published an official reason for this call word. What is certain: “Dynasty” is a kind of umbrella brand at China Airlines – the frequent flyer program is also called Dynasty Flyer, the lounges Dynasty Lounge. On the radio, the call word has a practical advantage: it sounds completely different from AIR CHINA, CHINA EASTERN or CHINA SOUTHERN, the callsigns of the big airlines from mainland China. On frequencies in Asia, where all these airlines operate, that is a clear gain in unambiguity.

The connection to brand history is interesting: in 1995, China Airlines replaced the national flag on the tail with a plum blossom, the national flower of the Republic of China – according to accounts in the literature, also to avoid international dispute over Taiwan’s political status.

Heirlooms: callsigns from predecessor airlines

One of the most common sources of puzzling call words is company history. Airlines change names, merge or launch new brands – the callsign often simply stays as it was.

• Channex – Jet2.com. The British leisure and scheduled airline Jet2 started in 2003 as a brand of the cargo airline Channel Express. The code EXS and the callsign CHANNEX date from that time and have stayed.
• Jersey – Flybe. Flybe began in 1979 as Jersey European Airways. The name changed in 2000 and 2002, but the callsign JERSEY with the code BEE stayed until the airline’s end in 2020.
• Tomjet – TUI Airways. TUI Airways was formerly called Britannia Airways, then Thomsonfly and Thomson Airways. With the renaming in 2017, the callsign TOMSON initially fell away; after an interim step via TUI AIR, the airline ended up with TOMJET – the “TOM” recalls the Thomson era, as does the code TOM.
• Cactus – America West and US Airways. America West came from Phoenix, Arizona, and fittingly called itself CACTUS. After the merger, US Airways took over the code AWE and, from 2008, the callsign for all flights. That is why the ditching on the Hudson in January 2009 went down in history as “Cactus 1549.” With the integration into American Airlines, CACTUS disappeared in 2015.
• Moxy – Breeze Airways. David Neeleman initially planned his new US airline under the name Moxy. Because of a trademark collision with a hotel chain, it was called Breeze Airways from 2020 – it kept the code MXY and the callsign MOXY.

For spotters, that has a practical side effect: a callsign can tell you which airline a current brand emerged from. How airlines work with multiple brands and operating companies is shown in the article on multi-brand strategies.

Places, founders and puns

Some call words are little riddles that only resolve with a bit of background knowledge.

Callsign	Airline	ICAO	Background
ROOSTER	Hahn Air	HHN	English for “Hahn” (German for rooster) – the name comes from the former home airfield Hahn in the Hunsrück
YELLOW CAB	Hapag-Lloyd Express (historic)	HLX	fits the yellow livery in New York taxi style with a checkerboard band
LINDBERGH	GoJet Airlines	GJS	named after Charles Lindbergh; GoJet has a base in St. Louis, namesake of his Spirit of St. Louis
BRICKYARD	Republic Airways	RPA	nickname of the Indianapolis racetrack; Republic is based in the Indianapolis area
REDWOOD	Virgin America (historic)	VRD	California airline, last scheduled flight under REDWOOD in January 2018
CONNIE	Kalitta Air	CKS	nickname of founder Conrad “Connie” Kalitta
MOONFLOWER	Neos	NOS	poetic call word of the Italian leisure airline
ITARROW	ITA Airways	ITY	coined word from “ITA” and “Arrow”
TOPSWISS	easyJet Switzerland	EZS	clearly sets the Swiss subsidiary apart from EASY (EZY)
BEE-LINE	Brussels Airlines	BEL	pun from “Bee” and “Line”

With some of these call words, the derivation is obvious – “Rooster” is simply the English translation of “Hahn.” With others, such as BRICKYARD or MOONFLOWER, the airlines have, according to our research, not officially explained their choice; the background column then describes the obvious connection.

AIRFRANS from Air France is similarly onomatopoeic: the spelling reproduces the pronunciation of “France” phonetically. And Qatar Airways calls itself QATARI, not “Qatar.”

When callsigns are too similar

Curious callsigns are not a gimmick but often a safety measure. If aircraft with similar-sounding callsigns fly on the same frequency, a pilot can accept a clearance that wasn’t meant for them at all. That applies to similar call words as well as to similar flight identifications of the same airline – for example two flights, 645 and 649, at the same time in the same airspace.

That is why EUROCONTROL runs a dedicated Call Sign Similarity Service. The Call Sign Management Cell in the Network Manager responsible for it helps airlines find and defuse similar callsigns in their summer and winter schedules. The rules are based on safety reports about actual mix-ups and even take into account similarities with runway designations, flight levels or frequencies.

The solution is often an alphanumeric flight identification: instead of a pure number, the airline appends letters, such as AFR65K, spoken “Airfrans six-five kilo.” European airlines in particular use such identifications. For you at the spot, that means: the flight identification on the radio often has little to do with the flight number on the departure board, but the call word in front of it stays constant. If you want to understand the air traffic control behind it better, read on at DFS German Air Navigation Services or in the history of air traffic control.

German callsigns: mostly plain

Compared with the British, the call words of German airlines are unspectacular. Lufthansa flies as LUFTHANSA (code DLH), Condor as CONDOR, Eurowings as EUROWINGS. It gets more interesting with special operators and historic airlines: the German Air Force’s Flugbereitschaft (air transport wing) calls itself GERMAN AIR FORCE, and besides Hahn Air and Hapag-Lloyd Express, Lufthansa’s cargo division also has a call word of its own with LUFTHANSA CARGO.

One reason for the plainness: a short, unambiguous company name already works well as a call word. An airline only has to resort to something else when the name is too long, too similar or already taken.

How to use callsigns when spotting

• Connect the live map and the radio. On the map you see the ICAO code (BAW, EIN, CAL), on the radio the call word. If you know both sides, you can immediately match radio calls to the right aircraft. Tips for the map side are provided by Flight tracking with ADS-B for spotters.
• Know the frequencies. Which frequency you need for approach, tower or ground traffic is explained in Understanding aviation radio frequencies.
• Callsigns are not registrations. The flight identification changes with every rotation, while the registration stays with the aircraft. For your collection, the registration therefore always counts – see Understanding aircraft registrations.
• Historic call words as a collecting theme. You no longer hear Clipper, Bealine or Cactus on the radio, but they are a nice entry into the history of the airlines you want to collect.

Conclusion

Airline callsigns are more than radio etiquette. They have to be unambiguous, easy to pronounce and distinctive – and that is exactly why many of them tell stories. Speedbird carries a logo from 1932 through time, Shamrock and Springbok stand for national symbols, Channex, Jersey and Cactus preserve the names of predecessor airlines, and Rooster or Lindbergh play with places and personalities. If you know this background, you hear aviation radio with different ears.