US United States Major Regions Postal Code Details

๐Ÿ›๏ธ New Castle ยท Delaware
19810
Arden
Arden new castle delaware 19810 United States
19897
Astrazeneca
Astrazeneca new castle delaware 19897 United States
19886
Bank Of America
Bank Of America new castle delaware 19886 United States
19701
Bear
Bear new castle delaware 19701 United States
19809
Bellefonte
Bellefonte new castle delaware 19809 United States
19734
Blackbird
Blackbird new castle delaware 19734 United States
19893
Chase Manhattan Bank N A
Chase Manhattan Bank N A new castle delaware 19893 United States
19702
Christiana
Christiana new castle delaware 19702 United States
19718
Christiana Medical Center
Christiana Medical Center new castle delaware 19718 United States
19721
Citibank
Citibank new castle delaware 19721 United States
19703
Claymont
Claymont new castle delaware 19703 United States
19706
Delaware City
Delaware City new castle delaware 19706 United States
19895
Delmarva Power
Delmarva Power new castle delaware 19895 United States
19898
Dupont Inc
Dupont Inc new castle delaware 19898 United States
19810
Edgemoor
Edgemoor new castle delaware 19810 United States
19805
Elsmere
Elsmere new castle delaware 19805 United States
19884
Greenville
Greenville new castle delaware 19884 United States
19707
Hockessin
Hockessin new castle delaware 19707 United States
19708
Kirkwood
Kirkwood new castle delaware 19708 United States
19720
Manor
Manor new castle delaware 19720 United States
19808
Marshallton
Marshallton new castle delaware 19808 United States
19709
Middletown
Middletown new castle delaware 19709 United States
19720
Minquadale
Minquadale new castle delaware 19720 United States
19710
Montchanin
Montchanin new castle delaware 19710 United States
19720
New Castle
New Castle new castle delaware 19720 United States
19716
Newark
Newark new castle delaware 19716 United States
19804
Newport
Newport new castle delaware 19804 United States
19730
Odessa
Odessa new castle delaware 19730 United States
19731
Port Penn
Port Penn new castle delaware 19731 United States
19732
Rockland
Rockland new castle delaware 19732 United States
19733
Saint Georges
Saint Georges new castle delaware 19733 United States
19725
Shared Firm Zip
Shared Firm Zip new castle delaware 19725 United States
19804
Stanton
Stanton new castle delaware 19804 United States
19803
Talleyville
Talleyville new castle delaware 19803 United States
19734
Townsend
Townsend new castle delaware 19734 United States
19893
Wilmington
Wilmington new castle delaware 19893 United States
19890
Wilmington Trust
Wilmington Trust new castle delaware 19890 United States
19735
Winterthur
Winterthur new castle delaware 19735 United States
19736
Yorklyn
Yorklyn new castle delaware 19736 United States

๐Ÿ“ฎUS United States Regional Postal Code FAQ & Postal Regulations

๐Ÿ“ฎ 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.

๐Ÿ” 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.

โš ๏ธ 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.

๐Ÿ”„ Do ZIP codes ever change?

Yes, USPS may update ZIP codes due to regional adjustments. Always confirm your ZIP code after an address change.

๐Ÿ“ฆ 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).

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๐Ÿ“ฎ Popular United States Postal Codes