Random ZIP Code Generator

Real codes, random picks

Each ZIP code is drawn from the 40,977 five-digit codes that the GeoNames postal code list holds for the 50 states and DC, spread over 29,540 places. With “Any state” the draw is weighted by how many codes a state has, so Texas and California turn up more often than Delaware or Rhode Island, much as they do in real customer data. Each code keeps its place and county, which you can copy as City, ST 12345 or download as CSV and JSON columns.

That makes the output useful where a made-up five-digit number is not: shipping-zone and tax-rate lookups, store locators, delivery-area checks and any form that verifies the ZIP code against the city.

First digit: the national area

The first digit of a ZIP code places it in one of ten national areas, running roughly from the Northeast (0) to the West Coast (9). These are the states in each area according to the codes the generator uses:

Digit	States	Also
0	CT, MA, ME, NH, NJ, NY, RI, VT	Puerto Rico, US Virgin Islands, military AE
1	DE, NY, PA	—
2	DC, MD, NC, SC, VA, WV	—
3	AL, FL, GA, MS, TN	military AA
4	IN, KY, MI, OH	—
5	DC, IA, MN, MT, ND, SD, WI	—
6	IL, KS, MO, NE	—
7	AR, LA, MO, OK, TX	—
8	AZ, CO, ID, NM, NV, TX, UT, WY	—
9	AK, CA, HI, OR, WA	Guam, American Samoa, military AP

Some states appear under two digits: New York’s Holtsville (005) and Fishers Island (063) sit in the 0 area, while the rest of New York is 1.

ZIP code prefixes by state

Three-digit prefixes in use in each state, with its number of ZIP codes and the place with the most codes. A state-level check such as “Texas ZIP codes are 75000–79999” misses outliers like Texas’s 733 and 885.

State	Prefixes	ZIP codes	Most codes
Alabama AL	350–352, 354–369	811	Birmingham
Alaska AK	995–999	273	Anchorage
Arizona AZ	850–853, 855–857, 859–860, 863–865	530	Phoenix
Arkansas AR	716–729	706	Little Rock
California CA	900–908, 910–928, 930–961	2,593	Sacramento
Colorado CO	800–816	645	Denver
Connecticut CT	060–069	429	Hartford
Delaware DE	197–199	96	Wilmington
District of Columbia DC	200, 202–205, 569	277	Washington
Florida FL	320–339, 341–342, 344, 346–347, 349	1,473	Miami
Georgia GA	300–319, 398–399	952	Atlanta
Hawaii HI	967–968	137	Honolulu
Idaho ID	832–838	320	Boise
Illinois IL	600–620, 622–629	1,575	Chicago
Indiana IN	460–479	968	Indianapolis
Iowa IA	500–516, 520–528	1,055	Des Moines
Kansas KS	660–662, 664–679	748	Wichita
Kentucky KY	400–418, 420–427	946	Louisville
Louisiana LA	700–701, 703–708, 710–714	719	New Orleans
Maine ME	039–049	485	Portland
Maryland MD	205–212, 214–219	605	Baltimore
Massachusetts MA	010–027, 055	685	Boston
Michigan MI	480–499	1,159	Detroit
Minnesota MN	550–551, 553–567	992	Minneapolis
Mississippi MS	386–397	531	Jackson
Missouri MO	630–631, 633–641, 644–658, 726	1,157	Kansas City
Montana MT	590–599	404	Billings
Nebraska NE	680–681, 683–693	620	Omaha
Nevada NV	889–891, 893–895, 897–898	254	Las Vegas
New Hampshire NH	030–038	281	Manchester
New Jersey NJ	070–089	723	Trenton
New Mexico NM	870–871, 873–884	427	Albuquerque
New York NY	005, 063, 100–149	2,154	New York
North Carolina NC	270–289	1,081	Charlotte
North Dakota ND	580–588	407	Fargo
Ohio OH	430–459	1,416	Cincinnati
Oklahoma OK	730–731, 734–741, 743–749	765	Oklahoma City
Oregon OR	970–979	481	Portland
Pennsylvania PA	150–196	2,176	Philadelphia
Rhode Island RI	028–029	90	Providence
South Carolina SC	290–299	534	Columbia
South Dakota SD	570–577	385	Sioux Falls
Tennessee TN	370–385	785	Memphis
Texas TX	733, 739, 750–770, 772–799, 885	2,600	Houston
Utah UT	840–847	347	Salt Lake City
Vermont VT	050–054, 056–059	308	Montpelier
Virginia VA	201, 205, 220–246	1,214	Roanoke
Washington WA	980–986, 988–994	716	Seattle
West Virginia WV	247–268	851	Charleston
Wisconsin WI	530–532, 534–535, 537–549	896	Milwaukee
Wyoming WY	820–831, 834	195	Cheyenne

ZIP, ZIP+4 and what a checker can tell

A ZIP+4 adds a hyphen and four digits that narrow the code to a block face, a building or a large mail recipient. Those segments are not published as open data, so the generator’s +4 part is random: right format, not a real segment. Use it to test fields that accept both 12345 and 12345-6789, and to check that your code does not cut the extension off or reject the hyphen.

The checker answers two questions: does the prefix belong to a state, and is the exact code in the list? Prefixes outside the states and DC are named too — Puerto Rico (006–009), Guam (969) and military mail (340 AA, 090–098 AE, 962–966 AP), which many forms wrongly accept as state addresses or wrongly reject.

Testing tips for ZIP code fields

Keep leading zeros. 02134 (Boston area) and 00501 must survive CSV import, spreadsheet export and integer columns.
Don’t hard-code state ranges. Derive the state from a prefix table, or let the user pick it, and accept the outliers above.
Accept ZIP+4 and strip it only when needed. Users paste 12345-6789, 123456789 and 12345 6789.
One ZIP code, many cities. Some codes cover several places and some places have dozens of codes; a city dropdown filled from the ZIP code should allow more than one answer.

Full address generators by state: Alaska California Delaware Florida Illinois New York Texas Washington

ZIP codes, places and counties: GeoNames postal code data, CC BY 4.0, checked October 2026.

Frequently asked questions

Are these real ZIP codes?

Yes. Every five-digit code comes from the GeoNames US postal code list, which follows the ZIP codes the USPS has assigned, including PO Box and unique ZIP codes for large organisations. The place and county are the ones listed for that code. Only the four extra digits of the ZIP+4 format are random, so a ZIP+4 is correct in format but not a real delivery segment.

Why do some ZIP codes start with 0?

ZIP codes in New England, New Jersey and Puerto Rico start with 0, and two New York codes (00501, 00544) are the lowest in the country. Spreadsheets and integer database columns drop the leading zero and turn 02134 into 2134. Store ZIP codes as text and test with a 0-prefixed one.

Can I get ZIP codes for one city?

The state pages linked below have a city picker: choose a state, then a city, and every generated address uses one of that city’s real ZIP codes. Here, pick a state and the ZIP codes come from all of its places.

How do I check whether a ZIP code exists?

Type it into the checker above. It tells you which state the first three digits belong to and whether the full code is in the list. A code that fits a state’s prefix but is not listed is most likely unassigned. For address-level validation you need the USPS address database or a verification service.

Is a ZIP code the same as a postal code?

It is the US kind of postal code: five digits, no letters. Canada uses six-character codes such as K1A 0B1 and the UK alphanumeric postcodes such as SW1A 1AA; see the Canadian and UK address generators.