| Zip Code | Area Code | City | County | Centroid | Other Information |
| 20855 | | Derwood | Montgomery | (39.11733, -77.1610916) | |
| 20895 | | North Bethesda | Montgomery | (39.0445535, -77.1188678) | |
| 20877 | 301 | Gaithersburg | Montgomery | (39.1253, -77.1895) | Observes Daylight Savings Time |
| 20916 | 301 | Silver Spring | Montgomery | (39.083, -77.0785) | Observes Daylight Savings Time |
| 20880 | 301 | Washington Grove | Montgomery | (39.1398, -77.1756) | Observes Daylight Savings Time |
| 20058 | 202 | Washington | District of Columbia | (39.0259, -77.138) | Observes Daylight Savings Time |
| 20908 | 301 | Silver Spring | Montgomery | (39.1035, -77.0763) | Observes Daylight Savings Time |
| 20884 | 301 | Gaithersburg | Montgomery | (39.141, -77.1945) | Observes Daylight Savings Time |
| 20896 | 301 | Garrett Park | Montgomery | (39.0341, -77.0944) | Observes Daylight Savings Time |
| 20859 | 301 | Potomac | Montgomery | (39.0257, -77.1977) | Observes Daylight Savings Time |
| 20827 | 301 | Bethesda | Montgomery | (39.014, -77.1602) | Observes Daylight Savings Time |
| 20883 | 301 | Gaithersburg | Montgomery | (39.1433, -77.2017) | Observes Daylight Savings Time |
| 20898 | 301 | Gaithersburg | Montgomery | (39.1433, -77.2017) | Observes Daylight Savings Time |
| 20906 | 301 | Silver Spring | Montgomery | (39.0829, -77.0612) | Observes Daylight Savings Time |
| 20878 | | North Potomac | Montgomery | (39.096432, -77.244955) | |
| 20878 | 301 | Gaithersburg | Montgomery | (39.1114, -77.242) | Observes Daylight Savings Time |
| 20897 | 301 | Suburban MD Facility | Montgomery | (39.0899, -77.056) | Observes Daylight Savings Time |
| 20885 | 301 | Gaithersburg | Montgomery | (39.1353, -77.2265) | Observes Daylight Savings Time |
| 20899 | 301 | Gaithersburg | Montgomery | (39.145, -77.2166) | Observes Daylight Savings Time |
| 20895 | 301 | Kensington | Montgomery | (39.0292, -77.0795) | Observes Daylight Savings Time |
| 20817 | 301 | Bethesda | Montgomery | (38.9996, -77.1551) | Observes Daylight Savings Time |
| 20892 | 301 | Bethesda | Montgomery | (39.011, -77.0983) | Observes Daylight Savings Time |
| 20891 | 301 | Kensington | Montgomery | (39.0259, -77.0732) | Observes Daylight Savings Time |
| 20889 | 301 | Bethesda | Montgomery | (39.0095, -77.098) | Observes Daylight Savings Time |
| 20854 | 301 | Potomac | Montgomery | (39.0287, -77.2409) | Observes Daylight Savings Time |