There are a number of fourth level domains that can be allocated for US websites.
These are usually restricted as to who can register them - typically Governments, schools, colleges, libraries, and museums.
The following formats exist:
| Domain format | Purpose |
| borough.[locality].[state].us | Borough Governments. |
| ci.[locality].[state].us | City Governments. |
| city.[locality].[state].us | City Governments. |
| co.[locality].[state].us | County Governments. |
| county.[locality].[state].us | County Governments. |
| [district-name].k12.[state].us | Public Elementary Schools. Secondary Unified School Districts. |
| [library-name].lib.[state].us | Public Libraries. (lib = Library.) |
| [museum-name].mus.[state].us | Museums. (mus = Museum.) |
| [organisation-name].cog.[state].us | Councils of Government (COG). |
| [organisation-name].dst.[state].us | Government Agencies in Administrative Districts. |
| [organisation-name].gen.[state].us | General Organisations that do not fit into any other of these categories. |
| [organisation-name].state.[state].us | State Government Agencies. |
| parish.[locality].[state].us | Parish Governments - believed to be no longer used. |
| [school-name].cc.[state].us | Community Colleges (CC). |
| [school-name[.[diocese-name].pvt.k12.[state].us | Private Elementary schools. Private Secondary Schools. |
| [school-name].k12.[state].us | Individual Elementary Schools. Individual Secondary Schools. |
| [school-name].pvt.k12.[state].us | Private Elementary Schools. Private Secondary Schools. |
| [school-name].tec.[state].us | Technical Schools. Vocational Schools. (tec = technical) |
| town.[locality].[state].us | Town Governments. |
| township.[locality].[state].us | Township Governments. |
| twp.[locality].[state].us | Township Governments. |
| vil.[locality].[state].us | Village Governments (vil = Village.) |
| village.[locality].[state].us | Village Governments. |
[diocese-name] is replaced with the name of the Diocese
[district-name] is replaced by the name of the district
[library-name] is replaced with the name of the library.
[locality] is replaced with the name of the village, town, city, or county name.
[museum-name] is replaced with the name of the museum.
[organisation-name] is replaced with the name of the organisation.
[school-name] is replaced with the name of the school.
[state] is replaced with the corresponding two letter state code.
Alphabetical index of State Abbreviations: select a letter to go straight to that lettered section.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
A
| ak | Alaska |
| al | Alabama |
| ar | Arkansas |
| az | Arizona |
| Alabama | al |
| Alaska | ak |
| Arkansas | ar |
| Arizona | az |
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B
There is nothing here at the moment. If you know of something that should be here - please let us know.
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C
| ca | California |
| co | Colorado |
| ct | Connecticut |
| California | ca |
| Colorado | co |
| Connecticut | ct |
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D
| de | Delaware |
| Delaware | de |
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E
There is nothing here at the moment. If you know of something that should be here - please let us know.
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F
| fl | Florida |
| Florida | fl |
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G
| ga | Georgia |
| Georgia | ga |
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H
| hi | Hawaii |
| Hawaii | hi |
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I
| ia | Iowa |
| id | Idaho |
| il | Illinois |
| in | Indiana |
| Idaho | id |
| Illinois | il |
| Indiana | in |
| Iowa | ia |
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J
There is nothing here at the moment. If you know of something that should be here - please let us know.
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K
| ks | Kansas |
| ky | Kentucky |
| Kansas | ks |
| Kentucky | ky |
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L
| la | Louisiana |
| Louisiana | la |
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M
| ma | Massachusetts |
| md | Maryland |
| me | Maine |
| mi | Michigan |
| mn | Minnesota |
| mo | Missouri |
| ms | Mississippi |
| mt | Montana |
| Maine | me |
| Maryland | md |
| Massachusetts | ma |
| Michigan | mi |
| Minnesota | mn |
| Mississippi | ms |
| Missouri | mo |
| Montana | mt |
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N
| nc | North Carolina |
| nd | North Dakota |
| ne | Nebraska |
| nh | New Hampshire |
| nj | New Jersey |
| nm | New Mexico |
| nv | Nevada |
| ny | New York |
| Nebraska | ne |
| Nevada | nv |
| New Hampshire | nh |
| New Jersey | nj |
| New Mexico | nm |
| New York | ny |
| North Carolina | nc |
| North Dakota | nd |
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O
| oh | Ohio |
| ok | Oklahoma |
| or | Oregon |
| Ohio | oh |
| Oklahoma | ok |
| Oregon | or |
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P
| pa | Pennsylvania |
| Pennsylvania | pa |
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Q
There is nothing here at the moment. If you know of something that should be here - please let us know.
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R
| ri | Rhode Island |
| Rhode Island | ri |
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S
| sc | South Carolina |
| sd | South Dakota |
| South Carolina | sc |
| South Dakota | sd |
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T
| tn | Tennessee |
| tx | Texas |
| Tennessee | tn |
| Texas | tx |
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U
| ut | Utah |
| Utah | ut |
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V
| va | Virginia |
| vt | Vermont |
| Vermont | vt |
| Virginia | va |
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W
| wa | Washington |
| wi | Wisconsin |
| wv | West Virginia |
| wy | Wyoming |
| Washington | wa |
| West Virginia | wv |
| Wisconsin | wi |
| Wyoming | wy |
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X
There is nothing here at the moment. If you know of something that should be here - please let us know.
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Y
There is nothing here at the moment. If you know of something that should be here - please let us know.
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Z
There is nothing here at the moment. If you know of something that should be here - please let us know.
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