| Country
|
| United Kingdom academic institutions
|
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
|
| 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
|
| 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
|
com
| US Commercial
|
cr
| Costa Rica
|
cs
| Czechoslovakia (former)
|
cu
| Cuba
|
cv
| Cape Verde
|
cx
| Christmas Island
|
cy
| Cyprus
|
cz
| Czech Republic
|
| Germany
|
dj
| Djibouti
|
dk
| Denmark
|
dm
| Dominica
|
do
| Dominican Republic
|
dz
| Algeria
|
| Ecuador
|
edu
| US Educational
|
ee
| Estonia
|
eg
| Egypt
|
eh
| Western Sahara
|
er
| Eritrea
|
es
| Spain
|
et
| Ethiopia |
|
|
| Country
|
| Finland
|
fj
| Fiji
|
fk
| Falkland Islands (Malvinas)
|
fm
| Micronesia
|
fo
| Faroe Islands
|
fr
| France
|
fx
| France (Metropolitan)
|
| Gabon
|
gb
| Great Britain (UK)
|
gd
| Grenada
|
ge
| Georgia
|
gf
| French Guiana
|
gh
| Ghana
|
gi
| Gibraltar
|
gl
| Greenland
|
gm
| Gambia
|
gn
| Guinea
|
gov
| US Government
|
gp
| Guadaloupe
|
gq
| Equatorial Guinea
|
gr
| Greece
|
gs
| South Georgia and South Sandwich Islands
|
gt
| Guatemala
|
gu
| Guam
|
gw
| Guinea-Bissau
|
gy
| Guyana
|
| Hong Kong
|
hm
| Heard and McDonald Islands
|
hn
| Honduras
|
hr
| Croatia (Hrvatska)
|
ht
| Haiti
|
hu
| Hungary
|
| Indonesia
|
ie
| Ireland
|
il
| Israel
|
in
| India
|
io
| British Indian Ocean Territory
|
iq
| Iraq
|
ir
| Iran
|
is
| Iceland
|
it
| Italy
|
| Jamaica
|
jo
| Jordan
|
jp
| Japan
|
ke
| Kenya
|
| Kyrgyzstan
|
kh
| Cambodia
|
ki
| Kiribati
|
km
| Comoros
|
kn
| Saint Kitts and Nevis
|
kp
| Korea (North)
|
kr
| Korea (South)
|
ku
| Kuwait
|
ky
| Cayman Islands
|
kz
| Kazakhstan
|
| Laos
|
lb
| Lebanon
|
lc
| Saint Lucia
|
li
| Liechtenstein
|
lk
| Sri Lanka
|
lr
| Liberia
|
ls
| Lesotho
|
lt
| Lithuania
|
lu
| Luxembourg
|
lv
| Latvia
|
ly
| Libya |
|
| Country
|
| Morocco
|
mc
| Monaco
|
md
| Moldova
|
mg
| Madagascar
|
mh
| Marshall Islands
|
mil
| US Military
|
mk
| Macedonia
|
ml
| Mali
|
mm
| Mynamar
|
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
|
| Namibia
|
nc
| New Caledonia
|
ne
| Niger
|
net
| US network
|
nf
| Norfolk Island
|
ng
| Nigeria
|
ni
| Nicaragua
|
nl
| Netherlands
|
no
| Norway
|
np
| Nepal
|
nr
| Nauru
|
nt
| Neutral Zone
|
nu
| Niue
|
nz
| New Zealand (Aotearoa)
|
| Oman
|
org
| US Non-Profit Organization
|
| Panama
|
pe
| Peru
|
pf
| French Polynesia
|
pg
| Papua New Guinea
|
ph
| Philippines
|
pk
| Pakistan
|
pl
| Poland
|
pm
| Saint Pierre and Miquelon
|
pn
| Pitcairn
|
pr
| Puerto Rico
|
pt
| Portugal
|
pw
| Palau
|
py
| Paraguay
|
| Qatar
|
| Reunion
|
ro
| Romania
|
ru
| Russian Federation
|
rw
| Rwanda |
|
|
| Country
|
| Saudi Arabia
|
sb
| Solomon Islands
|
sc
| Seychelles
|
sd
| Sudan
|
se
| Sweden
|
sg
| Singapore
|
sh
| Saint 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
|
| 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
|
| Ukraine
|
ug
| Uganda
|
uk
| United Kingdom
|
um
| US Minor Outlying Islands
|
us
| United States
|
uy
| Uruguay
|
uz
| Uzbekistan
|
| Vatican City State
|
vc
| Saint Vincent and the Grenadines
|
ve
| Venezuela
|
vg
| Virgin Islands (British)
|
vi
| Virgin Islands (US)
|
vn
| Viet Nam
|
vu
| Vanuatu
|
| Wallis and Futuna Islands
|
ws
| Samoa
|
| Yemen
|
yt
| Mayotte
|
yu
| Yugoslavia
|
| South Africa
|
zm
| Zambia
|
zr
| Zaire
|
zw
| Zimbabwe |
|