What ZIP codes does Kentucky use for mail and package delivery?

Kentucky (KY) operates within the 5-digit ZIP prefix range 400xx–427xx. Mail routed to state capital Frankfort and key regional centers such as Louisville, Lexington, Bowling Green adheres to these official USPS boundaries.

Which telephone area codes are valid for Kentucky?

Kentucky is served by 5 active North American Numbering Plan (NANPA) area codes: 270, 364, 502, 606, 859. Synthetic telephone numbers for Kentucky use those area codes with a 555 exchange, which is reserved for fictitious use.

How many counties are in Kentucky?

Kentucky is divided into 120 counties, including major administrative regions such as Jefferson, Fayette, Kenton, Boone. Generated street addresses use those names.

What postal formatting conventions and addressing quirks are unique to Kentucky?

Independent 'Home Rule' municipal enclaves within Jefferson County (Louisville Metro) where cities like St. Matthews or Jeffersontown possess separate taxing authorities inside Louisville postal codes. Third highest county count in the nation (120 historical counties) creating dense jurisdictional fragmentation across 400xx–427xx. All addresses generated on this platform format secondary unit designators (Apt, Ste, Fl) and street suffixes according to USPS CASS standards.

Are the Kentucky addresses generated on this page real places?

No. All street numbers, recipient names, and telephone numbers generated for Kentucky are entirely synthetic and randomized for software testing, database seed scripts, and form validation. They use Kentucky ZIP codes from public USPS data and real city names, but they do not correspond to real individuals or private residences.

Random Kentucky Address Generator

These addresses are randomly generated for software testing. They are not real people’s details: the street number, unit and recipient name are invented, and no record is checked for deliverability.

Randomly generated Kentucky mailing addresses for software testing, form validation and staging data. Each record pairs a real Kentucky city with a ZIP prefix that serves it and the county that city sits in, then adds a street number, a secondary unit designator and a recipient name that are invented.

Official Kentucky Postal & Geographic Reference Specifications

Geographic & Postal Parameter	Official State Specification	Standardization Reference
Postal State Abbreviation	KY	USPS Publication 28 & ISO 3166-2:US
5-Digit ZIP Prefix Range	400xx–427xx	USPS prefix-to-state assignment
Administrative Jurisdictions	120 Total Counties	US Census Bureau regional boundaries
Active Area Codes (NANPA)	`270, 364, 502, 606, 859` (5 total)	North American Numbering Plan Administrator
State Capital	Frankfort	US Census Bureau
Primary Time Zone	Eastern Time (America/New_York, UTC-5 / UTC-4 DST)	IANA time zone database

Kentucky Postal Geography & Key Cities

ZIP codes and Sectional Center Facilities are derived from public USPS ZIP code data, area codes from the North American Numbering Plan, and county names from US Census Bureau records. Street numbers and recipient names are synthetic, and nothing is checked against an address-verification service.

Cities the generator draws from:

Louisville
Lexington
Bowling Green
Owensboro
Covington

Key Counties & Administrative Jurisdictions

County boundaries determine local sales tax jurisdictions in Kentucky:

Jefferson County
Fayette County
Kenton County
Boone County
Warren County

Kentucky Area Codes (KY)

Generated phone numbers use the area codes listed in the reference table above, paired with a 555 exchange so no number can reach a real line. Generate Kentucky phone numbers.

Postal Delivery Standards & Format Nuances in Kentucky

Independent 'Home Rule' municipal enclaves within Jefferson County (Louisville Metro) where cities like St. Matthews or Jeffersontown possess separate taxing authorities inside Louisville postal codes.
Third highest county count in the nation (120 historical counties) creating dense jurisdictional fragmentation across 400xx–427xx.

Kentucky Address Examples in USPS Publication 28 Format

Residential Delivery Point:
100 Main St, Apt 4B Louisville, KY 40202-1204

Commercial / Multi-Unit Delivery Point:
Kentucky Logistics & Software Corp 500 Enterprise Way, Suite 300 Lexington, KY 40502-4810

Frequently Asked Questions about Kentucky Addresses

What ZIP codes does Kentucky use for mail and package delivery?: Kentucky (KY) operates within the 5-digit ZIP prefix range 400xx–427xx. Mail routed to state capital Frankfort and key regional centers such as Louisville, Lexington, Bowling Green adheres to these official USPS boundaries.
Which telephone area codes are valid for Kentucky?: Kentucky is served by 5 active North American Numbering Plan (NANPA) area codes: 270, 364, 502, 606, 859. Synthetic telephone numbers for Kentucky use those area codes with a 555 exchange, which is reserved for fictitious use.
How many counties are in Kentucky?: Kentucky is divided into 120 counties, including major administrative regions such as Jefferson, Fayette, Kenton, Boone. Generated street addresses use those names.
What postal formatting conventions and addressing quirks are unique to Kentucky?: Independent 'Home Rule' municipal enclaves within Jefferson County (Louisville Metro) where cities like St. Matthews or Jeffersontown possess separate taxing authorities inside Louisville postal codes. Third highest county count in the nation (120 historical counties) creating dense jurisdictional fragmentation across 400xx–427xx. All addresses generated on this platform format secondary unit designators (Apt, Ste, Fl) and street suffixes according to USPS CASS standards.
Are the Kentucky addresses generated on this page real places?: No. All street numbers, recipient names, and telephone numbers generated for Kentucky are entirely synthetic and randomized for software testing, database seed scripts, and form validation. They use Kentucky ZIP codes from public USPS data and real city names, but they do not correspond to real individuals or private residences.

Nearby & Bordering States

Explore test address generators for states sharing a geographic border with KY:

Kentucky ZIP Prefixes

The first three digits of a ZIP code place an address within Kentucky. These are the prefixes assigned to the state:

402xx, 405xx

Which processing facility sorts a given prefix is set by the current USPS labeling list L005 and changes as processing is consolidated, so it is not reproduced here. Look up a ZIP prefix to see its state and generate ZIP codes inside it.