AN2 is definitely the IATA code for the An-2.
When flight managers of the An-124 want to use An-124 they usually write A124 or A4F.
However, on the Malta Airport website link you gave me, they are using AN2 for one of the ADB aircraft -- I have emailed someone I know who might be able to confirm one way or the other, but a reply might not be forthcoming anytime soon -- depends when he get's it -- but seeing as they are not using a specific IATA code, it could be the An-22, An-124 or An-225 -- I will try to get confirmation one way or the other.
Haved you tried ringing MLA
airport to see if they can tell you exactly?
For your info, here are the IATA sanctioned official codes:
ANF N ANTONOV AN-12 FREIGHTER TURB N/A-N/A
A4F N ANTONOV AN-124 JET N/A-N/A
A40 N ANTONOV AN-140 TURB N/A-N/A
AN2 N ANTONOV AN-2 TURB 12-N/A
AN4 N ANTONOV AN-24 TURB 40- 50
AN6 N ANTONOV AN-26/30/32 TURB 50-N/A
AN7 N ANTONOV AN-72/74 JET N/A-N/A
A28 N ANTONOV/PZL MIELEC AN-280 TURB N/A-N/A
A26 N ANTONOV AN-26 TURB N/A-N/A
A30 N ANTONOV AN-30 TURB N/A-N/A
A32 N ANTONOV AN-32 TURB N/A-N/A
[Edited 2004-03-10 11:53:57]