Anatomy of a U.S. street address
How primary numbers, street names, suffixes, directionals, secondary units, city names, state abbreviations, and ZIP Codes work together.
Target hub / address systems
U.S. Addressing Standards
Understand postal format, local situs addresses, unit designators, directionals, ZIP Codes, geocoding, and the limits of address matching.
official sourcemap contextverified date
How to use this index
A U.S. address can serve postal delivery, emergency response, navigation, taxation, utility service, or local administration. The same place may therefore have a mailing address, situs address, rural route history, municipal label, and standardized form. Preserve the source and purpose before normalizing text, because a directional, unit designator, hyphen, or leading zero can distinguish records.
The guides in this atlas begin with USPS Publication 28, Census geocoding resources, and the federal address-data standard. They explain format and matching without implying that an address proves residence, identity, ownership, or a legal boundary. For land research, an address is usually a starting clue that must be connected to a jurisdiction, parcel identifier, legal description, and official record date.
Atlas rule
Use a directory entry to reach the maintaining public office. Do not treat an index row, mailing address, or map shape as proof of ownership, residence, title, or a surveyed boundary.
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USPS address standardization
How Publication 28 describes preferred address elements and why mailing format is not the same thing as legal situs.
Street suffixes and abbreviations
A practical reading guide to AVE, BLVD, CIR, CT, DR, HWY, LN, PKWY, PL, RD, ST, TER, and related forms.
Predirectionals and postdirectionals
Why N, S, E, W and compound directionals can distinguish otherwise similar street names.
Apartment and secondary-unit designators
How apartment, building, floor, room, suite, trailer, and unit designators are placed and interpreted.
City, state, and ZIP line
How postal city names, state abbreviations, and ZIP Codes support delivery without defining property boundaries.
Rural routes and highway contracts
How rural route and highway contract formats differ from conventional numbered street addresses.
PO Boxes versus situs addresses
Why a mailing address can be different from the physical location used by an assessor or emergency service.
Puerto Rico urbanization fields
Why an urbanization name is a distinct address element in many Puerto Rico addresses.
Hyphenated and ranged house numbers
How hyphens and ranges may encode local numbering systems and why punctuation should be preserved.
What ZIP Codes do and do not mean
ZIP Codes are USPS routing constructs, not cadastral boundaries or proof of municipal jurisdiction.
Validation versus verification
The difference between parsing, standardizing, geocoding, delivery validation, and confirming a physical location.
How geocoding matches an address
How an address is compared with reference ranges or points and why a match is not evidence of ownership.
Renamed streets and renumbered properties
A research workflow for comparing postal, emergency-service, assessor, and recorded-document references.
Address versus legal description
Why a street address is a convenience label while a legal description identifies land for conveyance.
Addresses near jurisdiction boundaries
How city labels, postal routes, county lines, and tax jurisdictions can describe different geographic systems.
New construction and address assignment
Which local offices may assign an address before it appears in postal, assessment, or GIS systems.
Authoritative address sources
A source hierarchy for USPS conventions, local assignment, Census geocoding, assessment records, and emergency addressing.
Common normalization errors
Why dropping unit designators, leading zeroes, hyphens, or directionals can point to the wrong record.
Address research checklist
A repeatable, privacy-conscious process for locating the right jurisdiction and official public record office.
Connect the layers
Move between the property-record guides, state directory, county directory, addressing standards, parcel concepts, GIS portal guide, glossary, and official source register. Each page states its verification date and separates observed official facts from conservative research guidance.