ZIP+4 Database Technical Specifications

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Database Fields


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Field Name Data Type Description
ZipCode Char(5) 00000-99999 Five digit numeric ZIP Code of the area.

UpdateKey

VarChar(10) A unique key number identifying this record for updates.
Action Char(1) A or D, meaning add or delete this record. Always an A for Base File.
RecordType Char(1) A flag indicating which type of record this is. Ex: Firm, General Delivery, High Rise, PO Box, Rural Route, or Street.
CarrierRouteID Char(4) Carrier identification code or number for a given delivery route or PO box presentation.
StPreDirAbbr Char(2) The directional abbreviation that comes before an address: Ex: The N meaning North in “123 N MAIN ST”
StName VarChar(28) The official name of the street as assigned by a local governing authority for this record.
StSuffixAbbr VarChar(4) Code that is the standard USPS abbreviation for the trailing designator in a street address.
StPostDirAbbr Char(2) A geographic direction that follows the street name. Ex: The N meaning North in “123 MAIN ST N”
AddressPrimaryLowNumber VarChar(10) The low number in a range of numeric or alphanumeric components to an address preceding the street name.
AddressPrimaryHighNumber VarChar(10) The high number in a range of numeric or alphanumeric components to an address preceding the street name.
AddressPrimaryOddEven Char(1) Code that identifies the side or sides of a street for which a given address range is applicable. O = Odd, E = Even.
BuildingFirmName VarChar(40) The name of a company, building, apartment complex, shopping center, or other distinguishing secondary address information.
AddressSecondaryAbbr VarChar(04) Only Applicable to Record Types F and H.
AddressSecondaryLowNumber VarChar(10) The low-end secondary address component in a range of secondary addresses. Only Applicable to Record Types F and H.
AddressSecondaryHighNumber VarChar(10) The high-end secondary address component in a range of secondary addresses. Only Applicable to Record Types F and H.
AddressSecondaryOddEven Char(1) Code that identifies the side or sides of a street for which a given address range is applicable. O = Odd, E = Even. Only Applicable to Record Types F and H.
Plus4Low Char(4) ZIP Add-On Low Number in the range. Also known as the +4.
Plus4High Char(4) ZIP Add-On High Number in the range. Also know nas the +4.
BaseAlternateCode Char(1) Code that specifies whether a record is a base (preferred) or alternate record. B= Base, A = Alternate
LACSStatus Char(1) L = LACS Converted, Blank = Not Applicable
GovernmentBuilding Char(1) This indicates what type of Government building this is if applicable.
FinanceNumber VarChar(6) A code assigned to Postal Service facilities (primarily post offices) to collect cost and statistical data and compile revenue and expense data.
State Char(2) A 2-character abbreviation for the name of a state, U.S. territory, or armed forces ZIP Code designation.
CountyFIPS Char(3) The 3-digit (FIPS) code assigned to counties in sequence within each state. Match this code with the County Table for county based info.
CongressionalDistrict Char(2) The 115th Congressional District this record is assigned to.
MunicipalityKey VarChar(6) Reserved for future use.
UrbanizationKey VarChar(6) An index to the Deluxe ZIP Code Database CityStateKey that provides the urbanization name for this delivery range.
PreferredLastLineKey VarChar(6) Match this field to our Deluxe ZIP Code Database CityStateKey for City name, City alias, Area Code, Time Zone, and more.
ToLatitude Decimal(10, 8) The north/south measurement indicating the end of this record.
FromLatitude Decimal(10, 8) The north/south measurement indicating the beginning for this record.
ToLongitude Decimal(11, 8) The east/west measurement indicating the end of this record.
FromLongitude Decimal(11, 8) The east/west measurement indicating the beginning for this record.
CensusTract Char(6) Small, locally delineated statistical areas within selected counties, generally having stable boundaries and, when first established by local communities, designed to have relatively homogeneous demographic characteristics.
CensusBlock Char(4) Blocks are numbered uniquely within each census tract with a 4-character number that identifies the collection block used in the census and a character block suffix. This character block suffix is often blank.
TLID Char(10) Tiger Line Identification (TLID) is a universal number associated with Census Bureau products.
LatLonMultiMatch Char(1) Code that specifies if a ZIP+4 has more than 1 Latitude/Longitude Match. Y = Yes, Blank = No
CenLat †< Decimal(11, 8) Latitude of the ZIP+4 Centroid. This is a street level centroid. The coordinate will not be house or building based. PREMIUM VERSION ONLY. †
CenLon †< Decimal(11, 8) Longitude of the ZIP+4 Centroid. This is a street level centroid. The coordinate will not be house or building based. PREMIUM VERSION ONLY. †
CensusBlockGroup †< VarChar(12) Census block group code (state, county, tract and block group codes) that correlates with the CenLat/CenLon. PREMIUM VERSION ONLY. †
CenLat ‡ Decimal(11, 8) Latitude of the ZIP+4 Centroid. This is a building based centroid. The coordinate will generally centered on the building or area it represents. DELUXE VERSION ONLY. ‡
CenLon ‡ Decimal(11, 8) Longitude of the ZIP+4 Centroid. This is a building based centroid. The coordinate will generally centered on the building or area it represents. DELUXE VERSION ONLY. ‡
CensusBlockGroup ‡ VarChar(12) Census block group code (state, county, tract and block group codes) that correlates with the CenLat/CenLon. DELUXE VERSION ONLY. ‡
* The Standard Lat/Lon & Census Tract/Block coverage is approximately 60% of available coordinates. This data is old and is not being updated, it should not be relied upon.
† The Premium Street based Centroid Lat/Lon & Census Tract/Block Group coverage is approximately 80+% of available coordinates.
‡ The Deluxe Building based Centroid Lat/Lon & Census Tract/Block Group coverage is approximately 95+% of available coordinates.
Portions of data are provided by the United States Postal Service and are © 2025. Zip-Codes.com is a non-exclusive licensee of the United States Postal Service.