US United States Major Regions Postal Code Details
🏛️ New Haven · Connecticut
06537Advertising Distr Co
Advertising Distr Co new haven connecticut 06537 United States
06401Ansonia
Ansonia new haven connecticut 06401 United States
06403Beacon Falls
Beacon Falls new haven connecticut 06403 United States
06524Bethany
Bethany new haven connecticut 06524 United States
06411Bloomingdales By Mail Ltd
Bloomingdales By Mail Ltd new haven connecticut 06411 United States
06405Branford
Branford new haven connecticut 06405 United States
06410Cheshire
Cheshire new haven connecticut 06410 United States
06540Conn Bank & Trust Co
Conn Bank & Trust Co new haven connecticut 06540 United States
06493Ct Gen Med Claims Office
Ct Gen Med Claims Office new haven connecticut 06493 United States
06418Derby
Derby new haven connecticut 06418 United States
06705East End
East End new haven connecticut 06705 United States
06513East Haven
East Haven new haven connecticut 06513 United States
06513Fair Haven
Fair Haven new haven connecticut 06513 United States
06494Fosdick Corp
Fosdick Corp new haven connecticut 06494 United States
06437Guilford
Guilford new haven connecticut 06437 United States
06514Hamden
Hamden new haven connecticut 06514 United States
06495International Masters Pub
International Masters Pub new haven connecticut 06495 United States
06408Macys By Mail
Macys By Mail new haven connecticut 06408 United States
06443Madison
Madison new haven connecticut 06443 United States
06451Meriden
Meriden new haven connecticut 06451 United States
06762Middlebury
Middlebury new haven connecticut 06762 United States
06460Milford
Milford new haven connecticut 06460 United States
06518Mount Carmel
Mount Carmel new haven connecticut 06518 United States
06538N Haven
N Haven new haven connecticut 06538 United States
06770Naugatuck
Naugatuck new haven connecticut 06770 United States
06510New Haven
New Haven new haven connecticut 06510 United States
06471North Branford
North Branford new haven connecticut 06471 United States
06473North Haven
North Haven new haven connecticut 06473 United States
06472Northford
Northford new haven connecticut 06472 United States
06477Orange
Orange new haven connecticut 06477 United States
06478Oxford
Oxford new haven connecticut 06478 United States
06704Plaza
Plaza new haven connecticut 06704 United States
06712Prospect
Prospect new haven connecticut 06712 United States
06493Publishers Clearing House
Publishers Clearing House new haven connecticut 06493 United States
06483Seymour
Seymour new haven connecticut 06483 United States
06487South Britain
South Britain new haven connecticut 06487 United States
06488Southbury
Southbury new haven connecticut 06488 United States
06770Union City
Union City new haven connecticut 06770 United States
06749Uniroyal Inc
Uniroyal Inc new haven connecticut 06749 United States
06701US Postal Service
US Postal Service new haven connecticut 06701 United States
06492Wallingford
Wallingford new haven connecticut 06492 United States
06710Waterbury
Waterbury new haven connecticut 06710 United States
06516West Haven
West Haven new haven connecticut 06516 United States
06515Westville
Westville new haven connecticut 06515 United States
06517Whitneyville
Whitneyville new haven connecticut 06517 United States
06705Wolcott
Wolcott new haven connecticut 06705 United States
06525Woodbridge
Woodbridge new haven connecticut 06525 United States
06701Wtby
Wtby new haven connecticut 06701 United States
06492Yalesville
Yalesville new haven connecticut 06492 United States
📋 United States Address and Delivery Guidance
📮
Use a Complete Delivery Address:
Include the recipient name, building or street address, locality, region where applicable, postal code when the destination uses one, and the destination country or territory.
🌍
Follow Local Address Conventions:
Use the language, character set and address order requested by the recipient, official postal operator or carrier. Do not assume every destination uses the same postal-code format.
✅
Verify Before Dispatch:
Confirm the postal code, service coverage and any customs or carrier requirements with the recipient and the relevant official postal operator before shipping.
💡
Delivery Information Is Context-Specific:
Postal codes help routing only in territories that use them. Accurate recipient details remain essential for delivery in every destination.
Postal information, sources and verification
Use this page as a routing reference and confirm the complete address, postal code format and delivery restrictions with the relevant official postal operator or carrier before dispatch.
Editorial and service accountability
This postal-code reference is maintained by the 56ok.com logistics-content team for international shipping preparation. It is reviewed against publicly available postal-operator information; it is not an official postal authority and does not replace carrier or customs instructions.
This reference is maintained as postal and carrier information changes. Need a correction? Contact our team.
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📮United States Postal FAQ and delivery guidance
📮 What is the format of a US ZIP code?
Standard format is 5 digits (e.g., 10001). Extended format is ZIP+4 (9 digits like 10001-1234) with a hyphen.
🔍 How to find the ZIP code for an address?
Use the USPS ZIP Code Lookup tool by entering the full address on the official USPS website.
⚠️ What happens if I use a wrong ZIP code?
Mail may be delayed, returned, or lost. For important documents, use USPS tracking and verify the ZIP code.
🔄 Do ZIP codes ever change?
Yes, USPS may update ZIP codes due to regional adjustments. Always confirm your ZIP code after an address change.
📦 Is a ZIP code required for international mail to the US?
Absolutely. Always include the US ZIP code at the end of the address (e.g., New York, NY 10001 USA).
