United States
37.1K
5 chars
56
3
Explore United States's 56 states with our interactive map.
Locate post offices across United States. Find addresses and contact information.
E‑commerce flows to United States require accurate five-digit postal data (99553); without it, US partners may hold parcels or downgrade service.
Key Characteristics
Code Type
Numeric
Administered By
National Postal Service
Coverage
Nationwide
United States uses numeric zip codes with 5 digits (example: 99553). In our directory, these codes are organized from states down to places.
Visual Structure
E‑commerce flows to United States require accurate five-digit postal data (99553); without it, US partners may hold parcels or downgrade service.
How United States organises areas for ZIP codes
Browse all 56 top-level divisions
Step-by-step guide for correct address formatting
Sample Address Block
Name; Street; City, State Postcode; Country
Tips for successful mail and package delivery
Always verify the ZIP code
Verify your ZIP code is complete (5 digits) before sending. Use our lookup tool to confirm accuracy.
Include all address levels
Write the full address hierarchy for best results.
Avoid abbreviations
Write out full state names to prevent sorting errors.
Don't omit the ZIP code
Missing ZIP codes cause significant delivery delays and may result in returned mail.
What to know when sending packages
Standard domestic delivery within United States typically takes 2–7 business days. International packages require complete address information including the ZIP code. Always include the correct 5-character code for fastest routing.
Common questions about United States ZIP codes
United States uses 5 digits in the ZIP code. An example is 99553. E‑commerce flows to United States require accurate five-digit postal data (99553); without it, US partners may hold parcels or downgrade service.
United States has 56 states with ZIP code coverage. Use our browse tool to explore them.
Use our free lookup or browse by state to find the exact ZIP code for your location.
The ZIP code is written on the same line as or immediately after the state, before the country name when mailing internationally.
United States
37.1K
5 chars
56
3
Explore United States's 56 states with our interactive map.
Locate post offices across United States. Find addresses and contact information.
E‑commerce flows to United States require accurate five-digit postal data (99553); without it, US partners may hold parcels or downgrade service.
Key Characteristics
Code Type
Numeric
Administered By
National Postal Service
Coverage
Nationwide
United States uses numeric zip codes with 5 digits (example: 99553). In our directory, these codes are organized from states down to places.
Visual Structure
E‑commerce flows to United States require accurate five-digit postal data (99553); without it, US partners may hold parcels or downgrade service.
How United States organises areas for ZIP codes
Browse all 56 top-level divisions
Step-by-step guide for correct address formatting
Sample Address Block
Name; Street; City, State Postcode; Country
Tips for successful mail and package delivery
Always verify the ZIP code
Verify your ZIP code is complete (5 digits) before sending. Use our lookup tool to confirm accuracy.
Include all address levels
Write the full address hierarchy for best results.
Avoid abbreviations
Write out full state names to prevent sorting errors.
Don't omit the ZIP code
Missing ZIP codes cause significant delivery delays and may result in returned mail.
What to know when sending packages
Standard domestic delivery within United States typically takes 2–7 business days. International packages require complete address information including the ZIP code. Always include the correct 5-character code for fastest routing.
Common questions about United States ZIP codes
United States uses 5 digits in the ZIP code. An example is 99553. E‑commerce flows to United States require accurate five-digit postal data (99553); without it, US partners may hold parcels or downgrade service.
United States has 56 states with ZIP code coverage. Use our browse tool to explore them.
Use our free lookup or browse by state to find the exact ZIP code for your location.
The ZIP code is written on the same line as or immediately after the state, before the country name when mailing internationally.