ZIP Code: 21720 - CAVETOWN, MD
ZIP Code 21720 is assigned to CAVETOWN, MD. In addition to basic details, this page includes the full ZIP+4 Codes and address information for ZIP Code 21720. You can also find related data, such as nearby ZIP Codes and other relevant geographic details.
21720 ZIP+4 Code List
ZIP Code 21720 includes many ZIP+4 Codes. Each ZIP+4 Code corresponds to a specific address or group of addresses. Below is a complete list of all ZIP+4 Codes within ZIP Code 21720, along with their associated addresses. You can also find a 9-digit ZIP Code by entering a full address.
| ZIP+4 Code | Address |
|---|---|
| 21720-0001 | PO BOX 1 (From 1 To 40), CAVETOWN, MD |
| 21720-0041 | PO BOX 41 (From 41 To 80), CAVETOWN, MD |
| 21720-0081 | PO BOX 81 (From 81 To 100), CAVETOWN, MD |
| 21720-0101 | PO BOX 101 (From 101 To 160), CAVETOWN, MD |
| 21720-0161 | PO BOX 161 (From 161 To 220), CAVETOWN, MD |
| 21720-1100 | 22509 CAVETOWN CHURCH RD, CAVETOWN, MD |
| 21720-6000 | 12117 (From 12117 To 12199 Odd) MAPLEVILLE RD, CAVETOWN, MD |
| 21720-6001 | 22500 (From 22500 To 22598 Even) CAVETOWN CHURCH RD, CAVETOWN, MD |
| 21720-6002 | 22511 (From 22511 To 22599 Odd) CAVETOWN CHURCH RD, CAVETOWN, MD |
| 21720-6003 | 22601 (From 22601 To 22699 Odd) CAVETOWN CHURCH RD, CAVETOWN, MD |
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Post Office in ZIP Code 21720
CAVETOWN is the only post office in ZIP Code 21720. You can find the address, phone number, and interactive map below. Click to view the service and service hours about CAVETOWN.
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CAVETOWN Post Office
Address 22509 CAVETOWN CHURCH RD, CAVETOWN, MD, 21720-9998
Phone 301-824-5230
*Street Parking Available
How to write a U.S. envelope?
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First, you need to fill in the recipient's mailing information in the center of the envelope. The first line is the recipient's name, the second line is the street address with a detailed house number, and the last line is the city, state abbr, and ZIP Code.
Second, write the sender's information on the left top corner of the envelope. If your mail cannot be delivered, it will return to the sender's address.
Finally, don't forget to stick the stamp on the right top corner. Otherwise, the letter will not go into the delivery process.
Here is the envelope example below.

What does each digit of ZIP Code 21720 stand for?
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The first digit designates a national area, which ranges from zero for the Northeast to nine for the far West.
The 2-3 digits represent a sectional center facility in that region.
The last two digits designate small post offices or postal zones.

Random Address in ZIP Code 21720
ZIP Code 21720 Map
This is the online map of CAVETOWN, Washington County, Maryland. You can use the controls to move around and zoom in or out. Map information is for reference only.
Nearby ZIP Codes to 21720
Nearby ZIP Codes include 21783, 21721, 21742, 21719, and 21780. These ZIP Codes are located within approximately 25 kilometers of ZIP Code 21720. The listed distances are approximate and provided for reference only.
| ZIP Code | Distance (Kilo Meters) |
|---|---|
| 21783 | 1.067 |
| 21721 | 3.82 |
| 21742 | 5.944 |
| 21719 | 10.06 |
| 21780 | 10.781 |
| 21746 | 11.037 |
| 21747 | 11.037 |
| 21734 | 11.087 |
| 17250 | 11.141 |
| 21740 | 11.204 |
| 21741 | 11.336 |
| 21749 | 11.43 |
| 21773 | 11.623 |
| 17272 | 14.483 |
| 17263 | 14.832 |
| 17214 | 14.834 |
| 21788 | 14.987 |
| 21767 | 15.109 |
| 21781 | 16.257 |
| 17256 | 16.446 |
| 21713 | 16.848 |
| 17268 | 17.018 |
| 17247 | 17.869 |
| 21733 | 18.466 |
| 21702 | 20.063 |
| 21795 | 21.476 |
| 21727 | 21.624 |
| 21778 | 21.953 |
| 17237 | 22.042 |
| 17225 | 22.404 |
| 21769 | 22.592 |
| 21756 | 23.946 |
| 17261 | 24.016 |
| 17320 | 24.3 |
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