I did a bit of searching in my archives, and I found this. If memory serves me right, this is the list that Magnus Larson (former chief of operation, for those who haven't been around for that long) posted, in the old days. Don't think the list has change since then.
BI - Iceland
EB - Belgium
ED - Germany
EE - Estonia
EF - Finland
EG - United Kingdom
EH - Holland/The Netherlands
EI - Ireland
EK - Denmark
EL - Luxemburg
EN - Norway
EP - Poland
ES - Sweden
EV - Latvia
EY - Lithuania
LA - Albania
LB - Bulgaria
LC - Cyprus
LD - Croatia
LE - Spain
LF - France
LG - Greece
LH - Hungary
LI - Italy
LJ - Slovenia
LK - Czech Republic
LM - Malta
LO - Austria
LP - Portugal
LQ - Bosnia
LR - Romania
LS - Switzerland
LT - Turkey
LU - Moldova
LW - Macedonia
LY - Yugoslavia
LZ - Slovak Republic
UI UL UR US UU UW - Russia
UK - Ukraine
UM - Belarus
Regards