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The majority of the United States may use COMcheck to show compliance. However, some states allow COMcheck use by county or jurisdiction rather than statewide (denoted by an asterisk [*]).
| Alabama | Maine | Oklahoma* |
| Arizona* | Maryland | Oregon |
| Arkansas | Massachusetts | Pennsylvania |
| Colorado | Michigan | Puerto Rico |
| Connecticut | Minnesota | Rhode Island |
| Delaware | Mississippi | South Carolina |
| Florida | Missouri* | South Dakota* |
| Georgia | Montana | Tennessee |
| Guam | Nebraska | Texas |
| Hawaii* | Nevada | U.S. Virgin Islands |
| Idaho | New Hampshire | Utah |
| Illinois | New Jersey | Vermont |
| Indiana | New Mexico | Virginia |
| Iowa | New York | Washington, D.C. |
| Kansas* | North Carolina | West Virginia |
| Kentucky | North Dakota* | Wisconsin |
| Louisiana | Ohio | Wyoming* |