Danh sách vùng
- 19897 - Astrazeneca, Wilmington, New Castle, Delaware
- 19884 - Bank of America, Wilmington, New Castle, Delaware
- 19891 - Bank of America, Wilmington, New Castle, Delaware
- 19893 - Chase Manhattan Bank, Wilmington, New Castle, Delaware
- 19892 - Citibank, Wilmington, New Castle, Delaware
- 19895 - Delmarva Power, Wilmington, New Castle, Delaware
- 19898 - Dupont Co Inc, Wilmington, New Castle, Delaware
- 19894 - Hercules Incorporated, Wilmington, New Castle, Delaware
- 19885 - Shared Firm Zip, Wilmington, New Castle, Delaware
- 19886 - Shared Firm Zip, Wilmington, New Castle, Delaware
- 19896 - Verizon, Wilmington, New Castle, Delaware
- 19890 - Wilmington Trust, Wilmington, New Castle, Delaware
- 19801 - Wilmington, New Castle, Delaware
- 19802 - Wilmington, New Castle, Delaware
- 19803 - Wilmington, New Castle, Delaware
- 19804 - Wilmington, New Castle, Delaware
- 19805 - Wilmington, New Castle, Delaware
- 19806 - Wilmington, New Castle, Delaware
- 19807 - Wilmington, New Castle, Delaware
- 19808 - Wilmington, New Castle, Delaware