Local Update of Census Addresses (LUCA) Record Layouts and File Naming Convention

This page describes the file naming convention and record layout for the Local Update of Census Addresses (LUCA) Address Count Listing Files.

File Naming Convention for LUCA Address Count Listing Files

These pipe delimited text files are named using the following convention: Census_Address_Block_Counts_<govid>.txt,  where:

  • <govid> = All federally recognized States, Alaska Native Regional Corporations (ANRC), American Indian areas (AIA), counties (and equivalent areas), incorporated places, consolidated cities, and minor civil divisions (MCDs) are assigned and identified by unique GOVID codes.

An example file name is: 

Census_Address_Block_Counts_72600000000.txt

 

Record Layout for LUCA Address Count Listing Files

Field Name Field Description
STATE Two-digit FIPS State code. This represents the “current” vintage of state. It may differ from the first two digits of the BLOCK_GEOID.
COUNTY Three-digit FIPS County code. This represents the “current” vintage of county. It may differ from digits 3-5 of the BLOCK_GEOID.
TRACT The Census Tract Number consists of six digits with an implied decimal between the fourth and fifth digit corresponding to the basic census tract number but with leading zeroes and trailing zeroes for census tracts without a suffix. This represents the “current” vintage of census tract. It may differ from digits 6-11 of the BLOCK_GEOID.
BLOCK Four-digit census block number and one-character alpha suffix (where applicable). Census blocks are numbered uniquely from 0000 to 9999 within census tract, which nest within state and county. The first digit of the census block number identifies the block group. Concatenate block suffixes to the block.
BLOCK_GEOID The BLOCK_GEOID consists of up to 16 characters (when including block suffix) and is used in joining the block level feedback data to the blocks in the partnership shapefiles. Concatenate vintage 55 STATEFP (CURBLKST), COUNTYFP (CURBLKCOU), TRACTCE (CURBLKTRACT), BLOCKCE (CURBLK), SUFFIX1CE (CURBLKSUFX1) (if applicable), and SUFFIX2CE (CURBLKSUFX2) (if applicable) in the BLOCK_GEOID.
TOTAL HOUSING UNITS Total number of addresses in the entity count list identified as housing units or transitory units by data in the Master Address File (MAF).
TOTAL GROUP QUARTERS Total number of addresses in the entity count list identified as group quarters by data in the MAF.
TOTAL TRANSITORY LOCATION Total number of addresses in the entity count list identified as transitory location by data in the MAF.
TOTAL UNITS Total number of addresses in the entity count list.
Page Last Revised - April 27, 2026