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

Iowa (IA) operates within the 5-digit ZIP prefix range 500xx–528xx. Mail routed to state capital Des Moines and key regional centers such as Des Moines, Cedar Rapids, Davenport adheres to these official USPS boundaries.

Which telephone area codes are valid for Iowa?

Iowa is served by 5 active North American Numbering Plan (NANPA) area codes: 319, 515, 563, 641, 712. Synthetic telephone numbers for Iowa use those area codes with a 555 exchange, which is reserved for fictitious use.

How many counties are in Iowa?

Iowa is divided into 99 counties, including major administrative regions such as Polk, Linn, Scott, Black Hawk. Generated street addresses use those names.

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

Cross-river border city postal overlapping with Nebraska (Council Bluffs/Omaha) and Illinois (Quad Cities: Davenport/Bettendorf/Rock Island/Moline) crossing multiple state economic zones. Section-line rural road grids across 99 counties featuring county-maintained gravel route designations. All addresses generated on this platform format secondary unit designators (Apt, Ste, Fl) and street suffixes according to USPS CASS standards.

Are the Iowa addresses generated on this page real places?

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

Random Iowa 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 Iowa mailing addresses for software testing, form validation and staging data. Each record pairs a real Iowa 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 Iowa Postal & Geographic Reference Specifications

Geographic & Postal Parameter	Official State Specification	Standardization Reference
Postal State Abbreviation	IA	USPS Publication 28 & ISO 3166-2:US
5-Digit ZIP Prefix Range	500xx–528xx	USPS prefix-to-state assignment
Administrative Jurisdictions	99 Total Counties	US Census Bureau regional boundaries
Active Area Codes (NANPA)	`319, 515, 563, 641, 712` (5 total)	North American Numbering Plan Administrator
State Capital	Des Moines	US Census Bureau
Primary Time Zone	Central Time (America/Chicago, UTC-6 / UTC-5 DST)	IANA time zone database

Iowa 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:

Des Moines
Cedar Rapids
Davenport
Sioux City
Iowa City

Key Counties & Administrative Jurisdictions

County boundaries determine local sales tax jurisdictions in Iowa:

Polk County
Linn County
Scott County
Black Hawk County
Johnson County

Iowa Area Codes (IA)

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 Iowa phone numbers.

Postal Delivery Standards & Format Nuances in Iowa

Cross-river border city postal overlapping with Nebraska (Council Bluffs/Omaha) and Illinois (Quad Cities: Davenport/Bettendorf/Rock Island/Moline) crossing multiple state economic zones.
Section-line rural road grids across 99 counties featuring county-maintained gravel route designations.

Iowa Address Examples in USPS Publication 28 Format

Residential Delivery Point:
100 Main St, Apt 4B Des Moines, IA 50309-1204

Commercial / Multi-Unit Delivery Point:
Iowa Logistics & Software Corp 500 Enterprise Way, Suite 300 Cedar Rapids, IA 52401-4810

Frequently Asked Questions about Iowa Addresses

What ZIP codes does Iowa use for mail and package delivery?: Iowa (IA) operates within the 5-digit ZIP prefix range 500xx–528xx. Mail routed to state capital Des Moines and key regional centers such as Des Moines, Cedar Rapids, Davenport adheres to these official USPS boundaries.
Which telephone area codes are valid for Iowa?: Iowa is served by 5 active North American Numbering Plan (NANPA) area codes: 319, 515, 563, 641, 712. Synthetic telephone numbers for Iowa use those area codes with a 555 exchange, which is reserved for fictitious use.
How many counties are in Iowa?: Iowa is divided into 99 counties, including major administrative regions such as Polk, Linn, Scott, Black Hawk. Generated street addresses use those names.
What postal formatting conventions and addressing quirks are unique to Iowa?: Cross-river border city postal overlapping with Nebraska (Council Bluffs/Omaha) and Illinois (Quad Cities: Davenport/Bettendorf/Rock Island/Moline) crossing multiple state economic zones. Section-line rural road grids across 99 counties featuring county-maintained gravel route designations. All addresses generated on this platform format secondary unit designators (Apt, Ste, Fl) and street suffixes according to USPS CASS standards.
Are the Iowa addresses generated on this page real places?: No. All street numbers, recipient names, and telephone numbers generated for Iowa are entirely synthetic and randomized for software testing, database seed scripts, and form validation. They use Iowa 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 IA:

Iowa ZIP Prefixes

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

503xx, 524xx

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.