was Trans Australia Airlines, later Australian Airlines, its now Air Tahati Nu and the new Australian Airlines is AO.
... which had been Spain´s Aviaco.
was East West is Eurowings
PA became some Spanish regional airline, Pan-something; today it´s Florida Coastal.
I´m pretty sure Dan Air´s DA was re-assigned, Russia seems to ring a bell.
Condor used to be DF
, now DF
is Spanair subsidiary Aerolíneas Baleares AeBal.
After Tasman Empire became Air New Zealand, TE
was available - and grabbed by Lithuanian.
Indonesia´s Bouraq should be much more happy with BO
than the previous owners, Air Columbus of Portugal.
Good old BN
(Braniff) was even given to two newcomers: Forward Air International Airlines and Horizon Airlines.
That´s all a short search at http://www.airlinecodes.co.uk
produced. Given the chronic shortage, I´m sure pretty much every defunct carrier´s code is re-assigned.