20817 Zip code is used for Westlake Area Code City in Montgomery County, Maryland in Usa. The ZIP Codes / Postal Codes are Used by USPS (United States Postal Service known as “Post Office”, “ Usa Mail”, or” Postal Service”, an independent agency of the United States federal government responsible for providing postal service in the United States). Below is the detail for 20817, Westlake Area Code City.
| Zip Code | : | 20817 |
| City Name | : | Westlake Area Code |
| County Name | : | Montgomery County |
| State Name | : | Maryland |
| Country Name | : | USA |
| Area Code | : | 301 |
| Time Zone | : | EST |
| Country Code | : | +1 |
| Currency | : | $ USA Dollor |
| ISO Code | : | USA |