These codes correspond to the IPL.SADR setting in /shared2/sys/SYSCONF.
Japan:
1: Japan
Americas:
8: Anguila
9: Antigua and Barbuda
10: Argentina
11: Aruba
12: Bahamas
13: Barbados
14: Belize
15: Bolivia
16: Brazil
17: British Virgin Islands
18: Canada
19: Cayman Islands
20: Chile
21: Colombia
22: Costa Rica
23: Dominica
24: Dominican Republic
25: Ecuador
26: El Salvador
27: French Guiana
28: Grenada
29: Guadeloupe
30: Guatemala
31: Guyana
32: Haiti
33: Honduras
34: Jamaica
35: Martinique
36: Mexico
37: Monsterrat
38: Netherlands Antilles
39: Nicaragua
40: Panama
41: Paraguay
42: Peru
43: St. Kitts and Nevis
44: St. Lucia
45: St. Vincent and the Grenadines
46: Suriname
47: Trinidad and Tobago
48: Turks and Caicos Islands
49: United States
50: Uruguay
51: US Virgin Islands
52: Venezuela
Europe:
64: Albania
65: Australia
66: Austria
67: Belgium
68: Bosnia and Herzegovina
69: Botswana
70: Bulgaria
71: Croatia
72: Cyprus
73: Czech Republic
74: Denmark
75: Estonia
76: Finland
77: France
78: Germany
79: Greece
80: Hungary
81: Iceland
82: Ireland
83: Italy
84: Latvia
85: Lesotho
86: Lichtenstein
87: Lithuania
88: Luxembourg
89: F.Y.R of Macedonia
90: Malta
91: Montenegro
92: Mozambique
93: Namibia
94: Netherlands
95: New Zealand
96: Norway
97: Poland
98: Portugal
99: Romania
100: Russia
101: Serbia
102: Slovakia
103: Slovenia
104: South Africa
105: Spain
106: Swaziland
107: Sweden
108: Switzerland
109: Turkey
110: United Kingdom
111: Zambia
112: Zimbabwe
//Some of these values are unconfirmed
Southeast Asia:
148: Taiwan
149: Korea
150: Hong Kong
151: MO
152: Indonesia
153: Singapore
154: Thailand
155: PH
156: MY
157: China
Middle East:
168: U.A.E.
169: India
170: EG
171: Omar
172: Qatar
173: Kuwait
174: Saudi Arabia
175: Syria
176: BH
177: Jordan
Or others 
