Yes. Com and. Co domain name?

First of all, ". Com is an international top-level domain name. Co "country code top-level domain name.

1, probably. Com domain name introduction

. Com domain name, the most widely popular universal domain name format in the world. . Com is a generic top-level domain name (gTLD) in the Internet domain name system. Its name comes from the English word "commercial", which indicates the original intention of commercial organizations to register this domain name.

2. Introduction of. Co domain name

Co domain name is the top-level domain name (ccTLD) assigned by ICANN, an Internet domain name governance organization, to the Republic of Colombia as its national and regional Internet top-level domain name. At present, it is managed by a Columbia University named Andean University. First, the domain name. Co is Colombia's top-level domain name, just like. Cn is China's top-level domain name.

3. What are the classifications of domain names?

first class domain name

Main projects: top-level domain name and international top-level domain name.

English: Top-level domain name, first-level domain name (TLD), also translated into international top-level domain name.

Generic top-level domain name main entry: generic top-level domain name

Generic top-level domain name:

No sponsorship: .biz.com.edu.gov.info.int.mil.name.net.org.pro.xyz.

Sponsor: .aero.cat.coop.jobs.museum.travel.mobi.asia.tel.xxx.

Basic architecture: arpa.root.tel

Approval stage:. postal service

Application stage: geo.kid.mail.sco.web

Delete/logout:. North Atlantic Treaty Organization (NATO)

Reserved:.

Pseudo domain name: .bitnet.csnet.local.onion.uucpothers.

The following is the current generic top-level domain name (plus. Arpa, sometimes considered as one of the generic top-level domains): Generic top-level domains were founded in 1985 1. At that time, * * * had six generic top-level domains, which were mainly used by the United States:

Description of domain name, creation time and scope of use

. Com- it is used by commercial organizations, but it is the most commonly used and is familiar and used by most people.

. Net- 1985 1 month, originally used by network service providers, now there is no restriction.

. Org- 1985 1 month, originally used by organizations that do not belong to other generic top-level domain names, is now unrestricted.

. edu/。 gov/。 American educational institutions/American government agencies/American military agencies mil- 1985 1 month. Due to historical problems, it is generally only used in the United States.

10 month, at the request of NATO. Int was used. The domain name was originally intended for some Internet infrastructure databases, such as ip6.int, IPv6 version. Indian address .. However, it was later suggested that all new databases should be used. Arpa (same as the system before TLD), the existing database will be migrated to. If possible, ip6.arpa can be used for IPv6 anti-search.

. Int-198811League of Nations and international organizations are used by international institutions established by treaties.

. Arpa- is an area reserved by the US military.

In 1997, the US government blocked the proposal of IAHC to establish seven new generic top-level domains. Art institutions. A firm business company. Information institutions. Nominate individuals. Entertainment institutions. Shops, commercial sales organizations and. Web internet related institutions).

June 2000165438+1October 65438+June, ICANN released seven new generic top-level domains:. Aviation. Business. coop，。 Information, Museums. Name,. Dear.

Aero- used for air transportation.

. for commercial use/purpose

. Coop- for cooperative use.

. Information-Information website, but not limited to this.

. The museum.-for the museum.

. Name-for family and personal use

. Pro-for some majors.

As of June 2005, ICANN has released several new generic top-level domains, and the details are still under study. Cats. Jobs, mobi，。 Post, Telephone,. Travel, XXX，。 Kid.

. Asia-for Asian communities.

. Cat-Catalan/culture.

. Job hunting-for employment-related websites.

. Websites for mobile phones and other devices.

Tourism-travel agencies, airlines, hotels and tourism associations.

. Telephone-A service used to connect a telephone network to the Internet.

The following generic top-level domains are under approval and may join the generic top-level domain server in the near future:

. Postal service-used for postal service.

. XXX- for pornographic websites.

. Mail-mail website.

Unofficial TLD and Suggestions: Various organizations and commercial organizations have put forward many new generic top-level domains, some of which were created informally, but they are not working properly, including. Berlin. sco，。 Love, etc.

Country code top-level domain name main entry: country code top-level domain name

(cctlds, country code top-level domain) is generally based on ISO-3 166. The suffix of the two words indicates the country or region where the domain name is located, such as: cn (Chinese mainland), de (Germany), eu (EU), jp (Japan), hk (Hong Kong), tw (Taiwan Province Province), uk (UK) and us (USA). (in alphabetical order)

Country code top-level domain name:

. Alternating current Advertising. ae。 af。 ag。 Ai. Al. I am. Ann. Oh. aq。 ar。 As. Yes. au。 Ah. Azerbaijan (short for Azerbaijan)

. Ba. bb。 bd。 Yes. bf。 bg。 bh。 Finish. bj。 bm。 10 billion bo. br。 Nonsense. bt。 bv。 bw。 By. bz

. California. Cc CD. See cg. Chestnut ci ck。 cl。 Centimeter. cn。 Company cr. Resume measured in cubic meters. cx。 Sai. War zone (short for combat zone)

. De. dj。 Dark dm. Go ahead. Domain name of Algeria

. European Community. ee。 Uh ... Yes et。 EU

. Fi. fj。 fk。 Frequency modulation. fo。 father

. Ga. gd。 Ge. gf。 gg。 gh。 gi。 gl。 General motors. gn。 gp。 gq。 General affairs. gt。 Gu. gw。 grey

. Hong kong. Hmm. hn。 hr .ht。 Hu (hanyu pinyin)

. Id card. Namely. Il. Instant message. Inch io IQ. ir。 Yes. it

. I know. jm。 Joe. Sheriff

. Ke. kg。 Cage. Kilometers. Knot kr Kilowatt. ky。 kz

. Los Angeles. Pounds. lc。 Li. lk lr。 ls。 Lieutenant Lu. Lu. Libya (short for libya)

. Horses. mc。 I am a doctor of medicine. mg。 mh。 mk .ml。 Hmm. Hmm. Mo. Senator. mq。 Ms. mu, Mr. mv。 mw。 mx。 Mine. mz

. I don't know nc。 Northeast. nf。 ng。 Ni. nl。 No. np。 Near anger. New Zealand

. Medal of merit

. Dad. Sports. pf。 pg。 Doctoral degree. Local afternoon. pn。 Yes, ps. Horn. pw。 Paraguay

. quality assurance

. About. ro。 Ru. Radiation weapon (abbreviation for radiation weapon)

. Mountain Someone (short for someone) is sd. se。 sg。 Shilling. Yes. sk。 sl。 sm。 sn。 So ... Senior San Jose. Size (short for size)

. tc。 td。 tf。 tg。 th。 tj。 tk。 tl。 tm。 tn。 To. tr。 tt。 television tw。 Tanzania

. ua。 ug。 Britain. We ... uy。 Uranium z

. Department of Veterans Affairs. ve。 vg。 Intransitive verb vn Vanuatu

. wf。 Washington star

. Leaves. yt。 Yu

. We ... zm。 zw

Reserved/Unassigned: cs.eh.kp

Allocated/unused: ax.bv.gb.sj.um

Gradually stop: tp.su

Delete/disable: cs.dd.zr

In use:

. CN stands for China, ending with. Cn, the domestic domain name of China, is suitable for its domestic institutions and enterprises, and is usually called English domestic top-level domain name and. Cn English domain name. 1997 65438+February 3 1 was born and opened. The registration office is CNNIC. According to national regulations, the second-level domain names are divided into six categories, with the suffix: .com.cn.net.cn.org.cn.gov.cn.edu.cn. Cn second-level domain name is now open.

Island domain name: reached an agreement with some private companies to open to the world.

. TV: Born. In 2000, he bought a TV company from Tuvalu, a small Pacific country, for $50 million. It opened on 200 1 and 1, and its registered office is. Television company. It is characterized by the direct association of concepts such as television, video and audio-visual.

. Cc: purchased birth group. Cc was established in Corcos Islands in the Indian Ocean in 2000, and opened in the registry of eNIC Company in 10. It is simple and easy to remember, easy to identify and imaginative. International companies like Intel and Coca-Cola have created. Cc domain name portal, which shows the value. Cc is increasing day by day.

Other level domain name

In addition to the top-level domain name, there is also the second-level domain name (SLD), which is the field closest to the left of the top-level domain name. For example, in zh.wikipedia.org, Wikipedia is a second-level domain name (data show that there is a first-level domain name behind the top-level domain name, so zh is a second-level domain name).

Then there is the third-level domain name, which is the field closest to the left of the second-level domain name. From right to left, there can be four-level domain names, five-level domain names and so on. Take www.ncic.ac.cn, a third-level domain name in use, as an example, where the www prefix indicates that the domain name corresponds to the World Wide Web service, and each domain name is separated by an English period. As a third-level domain name, "ncic" is a subdomain of "ac.cn".