ZIP Code 21778 Area Code
Rocky Ridge, Maryland
Area Code
301, 410, 443
Primary area codes for Maryland (per-ZIP data not available)
Location
| ZIP Code | 21778 |
|---|---|
| City | Rocky Ridge |
| State | Maryland (MD) |
| County | Frederick |
Frequently Asked Questions
ZIP code 21778 is in Rocky Ridge, Maryland. The primary area codes for Maryland are 301, 410, 443.
ZIP code 21778 is in Rocky Ridge, Maryland.