The Name Lookup Tables (NLTs) are among the geographic products that the Census Bureau provides to states and other data users containing the small area census data necessary for legislative redistricting. The NLTs contain the names and codes of every geographic area of the specific type within the state. These NLTs are designed to be used in conjunction with the Block Assignment File, if knowing the component blocks of the geographic area are needed.
NLTs have been created for each of the 50 states, the District of Columbia, and the Commonwealth of Puerto Rico. NLTs are not created for a geography type when that geography type does not exist in the state.