The following highways are numbered 423:
Canada
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United States
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Florida State Road 423
Louisiana Highway 423
Maryland Route 423
New Mexico State Road 423
New York State Route 423
Ohio State Route 423
Pennsylvania Route 423
Puerto Rico Highway 423
Farm to Market Road 423
| Preceded by 422 |
Lists of highways 423 |
Succeeded by 424 |
This article includes a list of roads, streets, highways, or other routes that are associated with the same title.
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