Originally Posted by
oliver2002
OS 455 is also
(BD) bmi 2805
(AC) Air Canada 6161
(NZ) Air New Zealand 4855
(LH) Lufthansa 6400
The R2 thing is either a database glitch or a decoding of OAL (normally means 'other airlines') into Orenair:
http://www.airfleets.net/flottecie/Orenair.htm
ORB is their ICAO code so can't see translation from OAL.