I believe it is Transaero Airlines
EVA - a Taiwanese airline uses the Airline IATA Code of BR.
Qantas Airways uses the airline code QF.
KLM
Jet2.com has the IATA airline designator code LS
Ryanair: IATA-Code:FRICAO-Code:RYRAirline:RyanairCountry:IrelandCallsign:Ryanair
Ryanair uses the code "FR" as a unique airline designator because it was assigned to the airline by the International Air Transport Association (IATA). This two-letter code is used to identify the airline in airline reservation systems, flight schedules, ticketing, and other airline-related operations worldwide.
EqyptAir's ICAO code is MSR; its IATA code is MS.
The airline code for El Al is LY.
The IATA airline code of Indigo Airlines is 6E.
PX is the IATA code for Air Niugini, the national airline of Papua New Guinea.
I don't know the airline code but maybe you mean the ID of Tallinn airport ( which is EETN ) .
The 2 Or 3 Letter Code Is Issued As An Airline Identifier By The ITIA