Print all Country Codes

Python 2, 240 bytes

Straightforward binary encoding implementation.

R=range(26)
print"\n".join(" ".join(chr(65+r)+chr(65+c)if int("8hfxckgq1olihfa47x3rrdkojzkklec7qk1hp4ht6avmzxfg7c4uv14xe0pzvvg93x81ag2bf88v2w0p3p08g8nwtuktbwosj9dytset3qmhdl72v5u62nepapgabdqqu7x",36)&1<<c+r*26 else"  "for c in R)for r in R)

The script for generating the integer is quick and dirty:

codes="""AA    AC AD AE AF AG    AI       AL AM AN AO AP AQ AR AS AT AU    AW AX    AZ
BA BB    BD BE BF BG BH BI BJ    BL BM BN BO    BQ BR BS BT BU BV BW BX BY BZ
CA    CC CD    CF CG CH CI    CK CL CM CN CO CP    CR CS    CU CV CW CX CY CZ
            DE    DG       DJ DK    DM    DO                            DY DZ
EA    EC    EE EF EG EH             EM       EP    ER ES ET EU EV EW         
                        FI FJ FK FL FM    FO       FR                FX      
GA GB GC GD GE GF GG GH GI       GL GM GN    GP GQ GR GS GT GU    GW    GY   
                              HK    HM HN          HR    HT HU               
   IB IC ID IE                   IL IM IN IO    IQ IR IS IT IU IV IW IX IY IZ
JA          JE                      JM    JO JP                              
            KE    KG KH KI          KM KN    KP    KR             KW    KY KZ
LA LB LC       LF       LI    LK                   LR LS LT LU LV       LY   
MA    MC MD ME MF MG MH       MK ML MM MN MO MP MQ MR MS MT MU MV MW MX MY MZ
NA    NC    NE NF NG    NI       NL       NO NP    NR    NT NU             NZ
OA                                  OM                                       
PA          PE PF PG PH PI    PK PL PM PN          PR PS PT       PW    PY   
QA                                  QM QN QO QP QQ QR QS QT QU QV QW QX QY QZ
RA RB RC    RE       RH RI       RL RM RN RO RP       RS    RU    RW         
SA SB SC SD SE SF SG SH SI SJ SK SL SM SN SO       SR SS ST SU SV    SX SY SZ
TA    TC TD    TF TG TH    TJ TK TL TM TN TO TP    TR    TT    TV TW       TZ
UA                UG          UK    UM                US                UY UZ
VA    VC    VE    VG    VI             VN                   VU               
               WF                WL       WO          WS       WV            
XA XB XC XD XE XF XG XH XI XJ XK XL XM XN XO XP XQ XR XS XT XU XV XW XX XY XZ
            YE                                           YT YU YV            
ZA                                  ZM             ZR             ZW       ZZ
"""
n = sum(1 << (x/3) for x in range(0, len(codes), 3) if codes[x] != " ")
def baseN(num,b,numerals="0123456789abcdefghijklmnopqrstuvwxyz"):
    return ((num == 0) and numerals[0]) or (baseN(num // b, b, numerals).lstrip(numerals[0]) + numerals[num % b])
print baseN(n, 36)

CJam, 125 122 121 bytes

"^Kéÿ·^?{ÿ·¿oÂ^Ú^À:ð^×à^Cé^Dÿ^Ýú^À^K^V^G^Áïþ ,^@^K^ÍBù(^_+óÿþºMa^À^H^@#ï^\¨^@ÿÿ¦|¨ÿþ}íßÕ^Ø\"^Â^Nª^P ^D^R$?ÿÿð^À^AÂ^@!^I"256b2b'[,65>_m*]z{~S2*?}%26/Sf*N*

The above uses caret notation for control characters.

Printable version (141 bytes) for the online interpreter:

"J`ki4#'Tr{$V!AcG)\d6o+rW97;#1|jN!WXL%GRuqYos0xCaaBzYgN97DOA'f@#@k'867BrCc1h?&d0LBq[st0YW^?b2Jfx.&gG:O(&"31f-95b2b'[,65>_m*]z{~S2*?}%26/Sf*N*

Example run

$ base64 -d > cc.cjam <<< Igvp/7d/e/+3v2/CmoA68JfgA+kE/536gAsWB4Hv/iAsAAuNQvkoHyvz//66TWGACAAj7xyoAP//pnyo//597d/VmFwigg6qECAEEiQ////wgAHCACEJIjI1NmIyYidbLDY1Pl9tKl16e35TMio/fSUyNi9TZipOKg==
$ LANG=en_US cjam cc.cjam
AA    AC AD AE AF AG    AI       AL AM AN AO AP AQ AR AS AT AU    AW AX    AZ                                                                                                                                      
BA BB    BD BE BF BG BH BI BJ    BL BM BN BO    BQ BR BS BT BU BV BW BX BY BZ                                                                                                                                      
CA    CC CD    CF CG CH CI    CK CL CM CN CO CP    CR CS    CU CV CW CX CY CZ                                                                                                                                      
            DE    DG       DJ DK    DM    DO                            DY DZ                                                                                                                                      
EA    EC    EE EF EG EH             EM       EP    ER ES ET EU EV EW                                                                                                                                               
                        FI FJ FK FL FM    FO       FR                FX      
GA GB GC GD GE GF GG GH GI       GL GM GN    GP GQ GR GS GT GU    GW    GY   
                              HK    HM HN          HR    HT HU               
   IB IC ID IE                   IL IM IN IO    IQ IR IS IT IU IV IW IX IY IZ
JA          JE                      JM    JO JP                              
            KE    KG KH KI          KM KN    KP    KR             KW    KY KZ
LA LB LC       LF       LI    LK                   LR LS LT LU LV       LY   
MA    MC MD ME MF MG MH       MK ML MM MN MO MP MQ MR MS MT MU MV MW MX MY MZ
NA    NC    NE NF NG    NI       NL       NO NP    NR    NT NU             NZ
OA                                  OM                                       
PA          PE PF PG PH PI    PK PL PM PN          PR PS PT       PW    PY   
QA                                  QM QN QO QP QQ QR QS QT QU QV QW QX QY QZ
RA RB RC    RE       RH RI       RL RM RN RO RP       RS    RU    RW         
SA SB SC SD SE SF SG SH SI SJ SK SL SM SN SO       SR SS ST SU SV    SX SY SZ
TA    TC TD    TF TG TH    TJ TK TL TM TN TO TP    TR    TT    TV TW       TZ
UA                UG          UK    UM                US                UY UZ
VA    VC    VE    VG    VI             VN                   VU               
               WF                WL       WO          WS       WV            
XA XB XC XD XE XF XG XH XI XJ XK XL XM XN XO XP XQ XR XS XT XU XV XW XX XY XZ
            YE                                           YT YU YV            
ZA                                  ZM             ZR             ZW       ZZ

Ruby, 269 246 241 235 227

g="b6wapsm769n90ongzuvadg5vdat6ap7v1oyyie3j5wxbq9xtycezrtt9xamn9riqnnxnsxjx0al8uk8rmk5snb7quly7t5i9rkq21r1vnns5vdm7gwzqtxwwwmj02nqxlhl".to_i 36
l=*?A..?Z
676.times{|i|print g.to_s(2)[i]==?1?l[i/26]+l[i%26]:"  ",i%26==25?$/:" "}

g is a matrix where each cell that has a country code is a 1 and all others are 0. All rows are written behind and the resulting binary number has been converted to a base 36 representation. Then I just iterate over all cells and check if the code shall be printed.