Country code and top-level domain

Country code, country code, country code, and known by their code number with country code (Country Code) and the prescribed ISO3166-1, by country or region.
Used for domain names on the Internet is usually represented by the two-letter top-level domains as well. "nhk.or.jp" is ".jp" and "yahoo.cn" top-level domain ".cn".
There are exceptions, such as might be the British ".gb" is used as the top-level domain.

Update:2016/12/04


Country codes and country names list

AC   Ascension IslandAD   AndorraAE   United Arab Emirates
AF   AfghanistanAG   Antigua and BarbudaAI   Anguilla
AL   AlbaniaAM   ArmeniaAN   Netherland Antilles
AO   AngolaAQ   AntarcticaAR   Argentina
AS   American SamoaAT   AustriaAU   Australia
AW   ArubaAZ   AzerbaidjanBA   Bosnia-Herzegovina
BB   BarbadosBD   BangladeshBE   Belgium
BF   Burkina FasoBG   BulgariaBH   Bahrain
BI   BurundiBJ   BeninBM   Bermuda
BN   Brunei DarussalamBO   BoliviaBR   Brazil
BS   BahamasBT   BhutanBV   Bouvet Island
BW   BotswanaBY   BelarusBZ   Belize
CA   CanadaCC   CocosCD   Rep. Dem. Congo
CF   Central African Rep.CG   CongoCH   Switzerland
CI   Ivory CoastCK   Cook IslandsCL   Chile
CM   CameroonCN   ChinaCO   Colombia
CR   Costa RicaCU   CubaCV   Cape Verde
CX   Christmas IslandCY   CyprusCZ   Czech Republic
DE   GermanyDJ   DjiboutiDK   Denmark
DM   DominicaDO   Dominican RepublicDZ   Algeria
EC   EcuadorEE   EstoniaEG   Egypt
EH   Western SaharaER   EritreaES   Spain
ET   EthiopiaFI   FinlandFJ   Fiji
FK   Falkland Isl.FM   MicronesiaFO   Faroe Islands
FR   FranceGA   GabonGB   Great Britain
GD   GrenadaGE   GeorgiaGF   Guiana
GG   GuernseyGH   GhanaGI   Gibraltar
GL   GreenlandGM   GambiaGN   Guinea
GP   GuadeloupeGQ   Equatorial GuineaGR   Greece
GS   South Georgia and   South Sandwich IslandsGT   Guatemala
GU   GuamGW   Guinea BissauGY   Guyana
HK   Hong KongHM   Heard & McDonald Isl.HN   Honduras
HR   CroatiaHT   HaitiHU   Hungary
ID   IndonesiaIE   IrelandIL   Israel
IM   Isle of ManIN   IndiaIO   British Indian O. Ter.
IQ   IraqIR   IranIS   Iceland
IT   ItalyJE   JerseyJM   Jamaica
JO   JordanJP   JapanKE   Kenya
KG   Kyrgyz RepublicKH   CambodiaKI   Kiribati
KM   ComorosKN   St.Kitts Nevis Ang.KP   Korea
KR   KoreaKW   KuwaitKY   Cayman Islands
KZ   KazakstanLA   LaosLB   Lebanon
LC   Saint LuciaLI   LiechtensteinLK   Sri Lanka
LR   LiberiaLS   LesothoLT   Lithuania
LU   LuxembourgLV   LatviaLY   Libya
MA   MoroccoMC   MonacoMD   Moldova
MG   MadagascarMH   Marshall IslandsMK   Macedonia
ML   MaliMM   MyanmarMN   Mongolia
MO   MacauMP   Northern Mariana Isl.MQ   Martinique
MR   MauritaniaMS   MontserratMT   Malta
MU   MauritiusMV   MaldivesMW   Malawi
MX   MexicoMY   MalaysiaMZ   Mozambique
NA   NamibiaNC   New CaledoniaNE   Niger
NF   Norfolk IslandNG   NigeriaNI   Nicaragua
NL   NetherlandsNO   NorwayNP   Nepal
NR   NauruNU   NiueNZ   New Zealand
OM   OmanPA   PanamaPE   Peru
PF   PolynesiaPG   Papua New GuineaPH   Philippines
PK   PakistanPL   PolandPM   St. Pierre & Miquelon
PN   PitcairnPR   Puerto RicoPS   Palestinian Terr
PT   PortugalPW   PalauPY   Paraguay
QA   QatarRE   ReunionRO   Romania
RU   Russian FederationRW   RwandaSA   Saudi Arabia
SB   Solomon IslandsSC   SeychellesSD   Sudan
SE   SwedenSG   SingaporeSH   St. Helena
SI   SloveniaSJ   Svalbard & Jan Mayen IsFISK   Slovakia
SL   Sierra LeoneSM   San MarinoSN   Senegal
SO   SomaliaSR   SurinameST   St. Tome and Principe
SU   Soviet UnionSV   El SalvadorSY   Syria
SZ   SwazilandTC   Turks & Caicos IslandsTD   Chad
TF   French Southern Terr.TG   TogoTH   Thailand
TJ   TadjikistanTK   TokelauTM   Turkmenistan
TN   TunisiaTO   TongaTP   East Timor
TR   TurkeyTT   Trinidad & TobagoTV   Tuvalu
TW   TaiwanTZ   TanzaniaUA   Ukraine
UG   UgandaUK   United KingdomUM   US Minor outlying Isl.
US   United StatesUY   UruguayUZ   Uzbekistan
VA   Vatican City StateVC   St.Vincent & GrenadinesVE   Venezuela
VG   Virgin IslandsVI   Virgin IslandsVN   Vietnam
VU   VanuatuWF   Wallis & Futuna IslandsWS   Western Samoa
YE   YemenYT   MayotteYU   Yugoslavia
ZA   South AfricaZM   ZambiaZW   Zimbabwe