Domain name type

computer science terminology
Types of domain names, computer terminology, and English domain name formats are as follows: domain names are composed of any combination of specific character sets, English letters, numbers, and "-" (i.e. hyphens or minus signs) in various countries, but they cannot contain "-" at the beginning or at the end. ". Letters in domain names are not case-sensitive. The domain name can be up to 67 bytes (including suffixes .com, .top, .tech, .net, .org, .biz, etc.).

Domain name can be up to 63 bytes
Domain name suffix com, .cx, .top, .net, .org
According to language, it can be divided into English domain name, Japanese domain name, etc.
Table of contents
1 category classification
▪By language
▪By region
▪By organization
2Domain name level
▪Top-level domain name
▪Second-level domain name
▪Third-level domain name
3Usage period
▪Term status
▪Use renewal
4Domain names of various countries and regions
Classification
broadcast
edit
By language
English domain names,  Japanese domain names and domain names in other languages;

Network real-name domain name:

By region

National domain names, also known as national top-level domain names (nTLDs for short), are assigned different suffixes according to different countries. These domain names are the country's national top-level domain names. More than 200 countries and regions have assigned top-level domain names according to ISO3166 country codes, such as us for the United States, jp for Japan, etc. See details below.
International domain names---domain names with the root domain suffix of .com, .top, .net, .org, .cc, .tv, etc.; national domain names---add the country code (such as Japan is .JP, and the United Kingdom is .UK) domain name with suffix;
By institution
Top-level domain name, second-level domain name; .com domain name is the earliest and most widely used domain name. For example, .com .top represents industrial and commercial enterprises, .net represents network providers, .org represents non-profit organizations, etc.
Common suffix forms:
COM commercial organization or company.
TOP top and benchmark organizations or individuals
TECH technology, technology
ORG non-profit organization, group
GOV Government Department.
MIL Military Division .
NET is an institution or company engaged in Internet-related activities;
CC unlimited;.
TV unlimited.
AC scientific research institution.
EDU Educational Institution. One of the Internet's general top-level domains, mainly used by educational institutions, such as universities and other institutions. It is intended for use by educational institutions around the world, but most of the actual educational institutions in use are located in the United States.
ARPA, a name inherited from ARPANET (the computer network established by the U.S. Defense Advanced Research Projects Agency), is used for internal functions of the Internet.
BIZ online business guide, suitable for commercial companies (note: biz is the customary abbreviation of business).
info Enterprises that provide information services.
pro is a general top-level domain name suitable for doctors, lawyers, accountants and other professionals.
name Generic top-level domain name suitable for personal registration
coop A dedicated top-level domain for business cooperatives
The us type represents the United States, ranking second in the world in terms of registrations
travel travel domain name, international domain name
xxx for adult, porn sites
idv for individuals
aero A dedicated top-level domain for the air transport industry
museum A dedicated top-level domain for museums
mobi domain name suitable for mobile networks
asia Domain names suitable for Asia
tel is a domain name suitable for telephone calls
int international organization
Domain name level
broadcast
edit
Top level domain
National domain names can be divided into different levels, including top-level domain names, second-level domain names, third-level domain names, etc.
Top-level domain names are divided into two categories:
The first is national top-level domain names (nTLDs for short). More than 200 countries have allocated top-level domain names according to ISO3166 country codes. For example,, the United States is us, Japan is jp, etc.;
The second is international top-level domain names (iTDs), such as .com .top representing industrial and commercial enterprises, .net representing network providers, .org representing non-profit organizations, etc. Most domain name disputes occur under the .com top-level domain name, because most companies go online to make profits. In order to strengthen domain name management and resolve the shortage of domain name resources, international organizations such as the Internet Association, the Internet Addressing Agency, and the World Intellectual Property Organization (WIPO), after extensive consultations, have established a new top-level domain name based on the original three international general top-level domain names: (com). Seven international general top-level domain names have been added: firm (company), store (sales company or enterprise), web (unit highlighting WWW activities), arts (unit highlighting cultural and entertainment activities), rec (unit highlighting recreation and entertainment activities) units), info (units that provide information services), nom (individuals), and select new registration agencies around the world to accept domain name registration applications.
secondary domain
The second-level domain name refers to the domain name under the top-level domain name. Under the international top-level domain name, it refers to the online name of the domain name registrant, such as ibm, yahoo, microsoft, etc.; under the national top-level domain name, it is a symbol indicating the category of the registered enterprise. , such as com, top, edu, gov, net, etc.
my country's top-level domain name officially registered and operated by the International Internet Network Information Center (Inter NIC) is CN, which is also my country's first-level domain name. Under the top-level domain names, my country's second-level domain names are divided into two categories: category domain names and administrative region names. There are 6 category domain names in total, including ac for scientific research institutions; com top for industrial and commercial financial enterprises; edu for educational institutions; gov for government departments; net for Internet network information centers and operation centers; org for non-profit organizations. There are 34 administrative region names, corresponding to each province, autonomous region and municipality directly under the Central Government in my country.
Third level domain name
The third-level domain name is composed of letters (A~Z, a~z, upper and lower case, etc.), numbers (0~9) and connectors (-). Domain names at all levels are connected with dots (.). The length cannot exceed 20 characters. If there are no special reasons, it is recommended to use the applicant's English name (or abbreviation) 
Period of use
broadcast
edit
term status
1. International domain names can be submitted for renewal within 30 days of expiration, but success is not guaranteed; 30-60 days after expiration is the redemption period (redemptionPeriod), and redemption fees can be paid for redemption, but success is not guaranteed. 60-75 days after expiration Days are the deletion period (pendingDelete). In this state, you can only wait for deletion and then re-register.
2. If the international domain name enters the redemption period after expiration: (REDEMPTION PERIOD), you can only choose to redeem it or wait for the domain name to be released and then re-register.
Use renewal

Domain names of various countries and regions
broadcast
edit
ad-AndorraAndorra
ae-United Arab Emirates United Arab Emirates
af-AfghanistanAfghanistan
ag-Antigua and BarbudaAntigua and Barbuda
ai-AnguillaAnguilla
al-Albania Albania
am-ArmeniaArmenia
an-Netherlands AntillesDutch dependencies
ao-AngolaAngola
aq-AntarcticaAntarctica
ar-ArgentinaArgentina
as-American SamoaEastern Samoa
at-AustriaAustria
au-AustraliaAustralia
aw-ArubaAruba
az-AzerbaijanAzerbaijan
ba-Bosnia Herzegovina Bosnia and Herzegovina
bb-BarbadosBarbados
bd-BangladeshBangladesh
be-BelgiumBelgium
bf-Burkina FasoBurkina Faso
bg-Bulgaria Bulgaria
bh-Bahrain Bahrain
bi-Burundi Burundi
bj-BeninBenin
bm-BermudaBermuda
bn-Brunei Darussalam Brunei
bo-BoliviaBolivia
br-BrazilBrazil
bs-BahamasBahamas
bt-BhutanBhutan
bv-Bouvet Island Bouvet Island
bw-Botswana Botswana
by-BelarusBelarus
bz-BelizeBelize
ca-CanadaCanada
cc-Cocos IslandsCocos Islands
cf-Central African RepublicCentral Africa
cg-CongoCongo
ch-SwitzerlandSwitzerland
ci-Ivory CoastIvory Coast
ck-Cook IslandsCook Islands
cl-ChileChile
cm-CameroonCameroon
cn-ChinaChina
co-ColombiaColombia
cq-Equatorial Guinea Equatorial Guinea
cr-Costa RicaCosta Rica
cu-CubaCuba
cv-Cape Verde Cape Verde
cx-Christmas Island Christmas Island (British)
cy-CyprusCyprus
cz-Czech RepublicCzech Republic
de-GermanyGermany
dj-Djibouti Djibouti
dk-DenmarkDenmark
dm-Dominica Dominican Republic
do-Dominican RepublicDominican Republic
dz-AlgeriaAlgeria
ec-Ecuador Ecuador
ee-Estonia Estonia
eg-EgyptEgypt
eh-Western Sahara Western Samoa
es-SpainSpain
et-Ethiopia Ethiopia
ev-El SalvadorEl Salvador
fi-FinlandFinland
fj-FijiFiji
fk-Falkland Islands Falkland Islands
fm-MicronesiaMicronesia
fo-Faroe IslandsFaroe Islands
fr-FranceFrance
ga-Gabon Gabon
gb-Great Britain (UK)United Kingdom of Great Britain
gd-GrenadaGrenada
ge-Georgia Georgia
gf-French Guiana French Guiana
gh-GhanaGhana
gi-GibraltarGibraltar
gl-GreenlandGreenland Islands
gm-Gambia Gambia
gn-Guinea Guinea
gp-Guadeloupe Guadeloupe (French)
gr-GreeceGreece
gt-GuatemalaGuatemala
gu-GuamGuam
gw-Guinea-BissauGuinea-Bissau
gy-GuyanaGuyana
hk-Hong KongHong Kong
hm-Heard Heard and McDonald Islands
hn-HondurasHonduras
hr-CroatiaCroatia
ht-HaitiHaiti
hu-HungaryHungary
id-Indonesia Indonesia
ie-Ireland Ireland
il-Israel Israel
in-IndiaIndia
io-British Indian Ocean Territory British Indian Ocean Territory
iq-IraqIraq
ir-Iran Iran
is-Iceland
it-Italy
jm-JamaicaJamaica
jo-Jordan
jp-JapanJapan
ke-KenyaKenya
kg-Kyrgyz StanKyrgyzstan
kh-CambodiaCambodia
ki-KiribatiKiribati
km-ComorosComoros
kn-St. Kitts Saint Kitts and Nevis
kp-Korea-North Korea
kr-Korea-South Korea
kw-Kuwait Kuwait
ky-Cayman Islands Cayman Islands (British)
kz-Kazakhstan Kazakhstan
la-Lao People's RepublicLaos
lb-LebanonLebanon
lc-St. Lucia St. Lucia Island
li-LiechtensteinLiechtenstein
lk-Sri LankaSri Lanka
lr-LiberiaLiberia
ls-LesothoLesotho
lt-LithuaniaLithuania
lu-LuxembourgLuxembourg
lv-LatviaLatvia
ly-LibyaLibya
ma-Morocco Morocco
mc-MonacoMonaco
md-MoldovaMoldova
mg-MadagascarMadagascar
mh-Marshall IslandsMarshall Islands
ml-MaliMali
mm-Myanmar Myanmar
mn-MongoliaMongolia
mo-MacaoMacau
mp-Northern Mariana IslandsNorthern Mariana Islands
mq-Martinique Martinique (French)
mr-MauritaniaMauritania
ms-MontserratMonserrat
mt-MaltaMalta
mv-MaldivesMaldives
mw-Malawi Malawi
mx-MexicoMexico
my-MalaysiaMalaysia
mz-MozambiqueMozambique
na-NamibiaNamibia
nc-New Caledonia New Caledonia
ne-Niger Niger
nf-Norfolk IslandNorfolk Island
ng-NigeriaNigeria
ni-NicaraguaNicaragua
nl-Netherlands Netherlands
no-NorwayNorway
np-NepalNepal
nr-NauruNauru
nt-Neutral ZoneNeutral Zone
nu-NiueNiue
nz-New ZealandNew Zealand
om-Oman Oman
pa-PanamaPanama
pe-PeruPeru
pf-French Polynesia French Polynesia
pg-Papua New Guinea Papua New Guinea
ph-PhilippinesPhilippines
pk-PakistanPakistan
pl-PolandPoland
pm-St. Pierre Saint Pierre and Miquelon
pn-Pitcairn Island Pitcairn Island
pr-Puerto RicoPuerto Rico
pt-PortugalPortugal
pw-PalauPalau
py-ParaguayParaguay
qa-QatarQatar
re-Reunion Island Reunion Island (French)
ro-Romania Romania
ru-Russian FederationRussia
rw-RwandaRwanda
sa-Saudi ArabiaSaudi Arabia
sb-Solomon IslandsSolomon Islands
sc-SeychellesSeychelles
sd-SudanSudan
se-SwedenSweden
sg-SingaporeSingapore
sh-St. Helena Helena
si-SloveniaSlovenia
sj-Svalbard Svalbard and Jan Mayen Island
sk-SlovakiaSlovakia
sl-Sierra LeoneSierra Leone
sm-San Marino San Marino
sn-Senegal Senegal
so-Somalia Somalia
sr-SurinameSuriname
st-Sao Tome Sao Tome and Principe
su-USSR Soviet Union
sy-Syrian Arab RepublicSyria
sz-SwazilandSwaziland
tc-Turks Turks and Caicos Islands
td-Chad Chad
tf-French Southern Territories French Southern Hemisphere Territories
tg-Togo Togo
th-ThailandThailand
tj-TajikistanTajikistan
tk-TokelauTokelau Islands
tm-Turkmenistan Turkmenistan
tn-TunisiaTunisia
to-Tonga
tp-East Timor East Timor
tr-TurkeyTurkey
tt-Trinidad Trinidad and Tobago
tv-TuvaluTuvalu
tw-Taiwan Taiwan
tz-TanzaniaTanzania
ua-Ukrainian SSR Ukraine
ug-UgandaUganda
UK-United KingdomUK
us-United StatesUnited States
uy-UruguayUruguay
va-Vatican City StateVatican
vcSt.- Vincent Saint Vincent and the Grenadines
ve-VenezuelaVenezuela
vg-Virgin IslandsVirgin Islands
vn-VietnamVietnam
vu-VanuatuVanuatu
wf-Wallis Wallis and Futuna Islands
ws-SamoaWestern Samoa
ye-YemenYemen
yu-Yugoslavia Yugoslavia
za-South AfricaSouth Africa
zm-Zambia Zambia
zr-Zaire Zaire
zw-ZimbabweZimbabwe