Country Codes and Top Level Domains
- AD = Andorra
- AE = United Arab Emirates
- AF = Afghanistan
- AG = Antigua and Barbuda
- AI = Anguilla
- AL = Albania
- AM = Armenia
- AN = Netherlands Antilles
- AO = Angola
- AQ = Antarctica
- AR = Argentina
- AS = American Samoa
- AT = Austria
- AU = Australia
- AW = Aruba
- AZ = Azerbaijan
- BA = Bosnia and Herzegovina
- BB = Barbados
- BD = Bangladesh
- BE = Belgium
- BF = Burkina Faso
- BG = Bulgaria
- BH = Bahrain
- BI = Burundi
- BJ = Benin
- BM = Bermuda
- BN = Brunei Darussalam
- BO = Bolivia
- BR = Brazil
- BS = Bahamas
- BT = Bhutan
- BV = Bouvet Island
- BW = Botswana
- BY = Belarus
- BZ = Belize
- CA = Canada
- CC = Cocos (Keeling) Islands
- CF = Central African Republic
- CG = Congo
- CH = Switzerland
- CI = Cote D'Ivoire (Ivory Coast)
- CK = Cook Islands
- CL = Chile
- CM = Cameroon
- CN = China
- CO = Colombia
- CR = Costa Rica
- CS = Czechoslovakia (former)
- CU = Cuba
- CV = Cape Verde
- CX = Christmas Island
- CY = Cyprus
- CZ = Czech Republic
- DE = Germany
- DJ = Djibouti
- DK = Denmark
- DM = Dominica
- DO = Dominican Republic
- DZ = Algeria
- EC = Ecuador
- EE = Estonia
- EG = Egypt
- EH = Western Sahara
- ER = Eritrea
- ES = Spain
- ET = Ethiopia
- FI = Finland
- FJ = Fiji
- FK = Falkland Islands (Malvinas)
- FM = Micronesia
- FO = Faroe Islands
- FR = France
- FX = France, Metropolitan
- GA = Gabon
- GB = Great Britain (UK)
- GD = Grenada
- GE = Georgia
- GF = French Guiana
- GH = Ghana
- GI = Gibraltar
- GL = Greenland
- GM = Gambia
- GN = Guinea
- GP = Guadeloupe
- GQ = Equatorial Guinea
- GR = Greece
- GS = S. Georgia and S. Sandwich Isls.
- GT = Guatemala
- GU = Guam
- GW = Guinea-Bissau
- GY = Guyana
- HK = Hong Kong
- HM = Heard and McDonald Islands
- HN = Honduras
- HR = Croatia (Hrvatska)
- HT = Haiti
- HU = Hungary
- ID = Indonesia
- IE = Ireland
- IL = Israel
- IN = India
- IO = British Indian Ocean Territory
- IQ = Iraq
- IR = Iran
- IS = Iceland
- IT = Italy
- JM = Jamaica
- JO = Jordan
- JP = Japan
- KE = Kenya
- KG = Kyrgyzstan
- KH = Cambodia
- KI = Kiribati
- KM = Comoros
- KN = Saint Kitts and Nevis
- KP = Korea (North)
- KR = Korea (South)
- KW = Kuwait
- KY = Cayman Islands
- KZ = Kazakhstan
- LA = Laos
- LB = Lebanon
- LC = Saint Lucia
- LI = Liechtenstein
- LK = Sri Lanka
- LR = Liberia
- LS = Lesotho
- LT = Lithuania
- LU = Luxembourg
- LV = Latvia
- LY = Libya
- MA = Morocco
- MC = Monaco
- MD = Moldova
- MG = Madagascar
- MH = Marshall Islands
- MK = Macedonia
- ML = Mali
- MM = Myanmar
- MN = Mongolia
- MO = Macau
- MP = Northern Mariana Islands
- MQ = Martinique
- MR = Mauritania
- MS = Montserrat
- MT = Malta
- MU = Mauritius
- MV = Maldives
- MW = Malawi
- MX = Mexico
- MY = Malaysia
- MZ = Mozambique
- NA = Namibia
- NC = New Caledonia
- NE = Niger
- NF = Norfolk Island
- NG = Nigeria
- NI = Nicaragua
- NL = Netherlands
- NO = Norway
- NP = Nepal
- NR = Nauru
- NT = Neutral Zone
- NU = Niue
- NZ = New Zealand (Aotearoa)
- OM = Oman
- PA = Panama
- PE = Peru
- PF = French Polynesia
- PG = Papua New Guinea
- PH = Philippines
- PK = Pakistan
- PL = Poland
- PM = St. Pierre and Miquelon
- PN = Pitcairn
- PR = Puerto Rico
- PT = Portugal
- PW = Palau
- PY = Paraguay
- QA = Qatar
- RE = Reunion
- RO = Romania
- RU = Russia
- RW = Rwanda
- SA = Saudi Arabia
- Sb = Solomon Islands
- SC = Seychelles
- SD = Sudan
- SE = Sweden
- SG = Singapore
- SH = St. Helena
- SI = Slovenia
- SJ = Svalbard and Jan Mayen Islands
- SK = Slovak Republic
- SL = Sierra Leone
- SM = San Marino
- SN = Senegal
- SO = Somalia
- SR = Suriname
- ST = Sao Tome and Principe
- SU = USSR (former)
- SV = El Salvador
- SY = Syria
- SZ = Swaziland
- TC = Turks and Caicos Islands
- TD = Chad
- TF = French Southern Territories
- TG = Togo
- TH = Thailand
- TJ = Tajikistan
- TK = Tokelau
- TM = Turkmenistan
- TN = Tunisia
- TO = Tonga
- TP = East Timor
- TR = Turkey
- TT = Trinidad and Tobago
- TV = Tuvalu
- TW = Taiwan
- TZ = Tanzania
- UA = Ukraine
- UG = Uganda
- UK = United Kingdom
- UM = US Minor Outlying Islands
- US = United States
- UY = Uruguay
- UZ = Uzbekistan
- VA = Vatican City State (Holy See)
- VC = Saint Vincent and the Grenadines
- VE = Venezuela
- VG = Virgin Islands (British)
- VI = Virgin Islands (U.S.)
- VN = Viet Nam
- VU = Vanuatu
- WF = Wallis and Futuna Islands
- WS = Samoa
- YE = Yemen
- YT = Mayotte
- YU = Yugoslavia
- ZA = South Africa
- ZM = Zambia
- ZR = Zaire
- ZW = Zimbabwe
- COM = US Commercial
- EDU = US Educational
- GOV = US Government
- INT = International
- MIL = US Military
- NET = Network
- ORG = Non-Profit Organization
- ARPA = Arpanet
- NATO = Nato field