Country Information

CountryUnited States
ISO CodeUS / USA
LanguageEnglish
Total Records42,605

United States uses a numeric code of 5 (or 5+4) digits (e.g. 10001). ZIP Code (5 digits) with optional ZIP+4 extension.

This database currently holds 42,605 ZIP Codes ranging from 00501 to 99929, linked to 0 building and address records. Because a single ZIP Code can cover more than one locality or delivery point, the lookup below groups addresses by code and lets you drill into the individual records.

Postal codes matter well beyond mail delivery. Couriers, e-commerce checkout forms and address autocomplete tools rely on the ZIP Code to route a parcel and to verify that the stated address matches the code. Addresses here are organised as State → County → City. The code itself is structured as ZIP Code → ZIP+4 → Delivery Point, which is postal geography and not the same as the administrative hierarchy. When you look up a code here, treat the associated name as a reference point rather than a full postal address — always confirm the street and house number with the sender or recipient before shipping.

Data source: a third-party open dataset. This is an imported reference dataset, not a live government feed; CodeReff does not independently verify each record, so codes may have changed since the snapshot was taken. Use the search box to look up a specific code, or browse the paginated table below.

United States Postcode Data

42,605 postcode found

Postal Code State County City Records
04548 Maine Sagadahoc Georgetown 1
04549 Maine Lincoln Isle of Springs 1
04551 Maine Lincoln Bremen 1
04553 Maine Lincoln Newcastle 1
04554 Maine Lincoln New Harbor 1
04555 Maine Lincoln Nobleboro 1
04556 Maine Lincoln Edgecomb 1
04558 Maine Lincoln Pemaquid 1
04562 Maine Sagadahoc Phippsburg 1
04563 Maine Knox Cushing 1
04564 Maine Lincoln Round Pond 1
04565 Maine Sagadahoc Sebasco Estates 1
04567 Maine Sagadahoc Small Point 1
04568 Maine Lincoln South Bristol 1
04570 Maine Lincoln Squirrel Island 1
04571 Maine Lincoln Trevett 1
04572 Maine Lincoln Waldoboro 1
04573 Maine Lincoln Walpole 1
04574 Maine Knox Washington 1
04575 Maine Lincoln West Boothbay Harbor 1
04576 Maine Lincoln Southport 1
04578 Maine Lincoln Wiscasset 1
04579 Maine Sagadahoc Woolwich 1
04605 Maine Hancock Ellsworth 1
04606 Maine Washington Addison 1
04607 Maine Hancock Gouldsboro 1
04609 Maine Hancock Bar Harbor 1
04611 Maine Washington Beals 1
04612 Maine Hancock Bernard 1
04613 Maine Hancock Birch Harbor 1
04614 Maine Hancock Blue Hill 1
04615 Maine Hancock Blue Hill Falls 1
04616 Maine Hancock Brooklin 1
04617 Maine Hancock Brooksville 1
04619 Maine Washington Calais 1
04622 Maine Washington Cherryfield 1
04623 Maine Washington Columbia Falls 1
04624 Maine Hancock Corea 1
04625 Maine Hancock Cranberry Isles 1
04626 Maine Washington Cutler 1
04627 Maine Hancock Deer Isle 1
04628 Maine Washington Dennysville 1
04629 Maine Hancock East Blue Hill 1
04630 Maine Washington East Machias 1
04631 Maine Washington Eastport 1
04634 Maine Hancock Franklin 1
04635 Maine Hancock Frenchboro 1
04637 Maine Washington Grand Lake Stream 1
04640 Maine Hancock Hancock 1
04642 Maine Hancock Harborside 1

Postcodes by Region

Postcodes by City

Frequently Asked Questions

United States uses a numeric code of 5 (or 5+4) digits (e.g. 10001). ZIP Code (5 digits) with optional ZIP+4 extension.
Yes. United States postal codes are a plain numeric string, so a leading zero is part of the code itself. A code beginning with 0 must be written and stored with that zero — it is not the same as the same digits without it.
42,605 This database currently lists
The records are imported from a third-party open dataset, an open reference dataset. CodeReff does not independently verify each entry, so use the information as a reference rather than an official confirmation.
Enter a full or partial postal code, or a building or street name, in the search box above. You can also browse the paginated table and open any code to see its building and address records.
Information provided on CodeReff is for reference purposes only. Always verify financial and banking details with the relevant institution before use.