District of Columbia
| Area Code | Phone Number | City | State |
| 240 | 336-0089 | Bethesda | DC |
| 240 | 325-0089 | Damascus | DC |
| 240 | 327-0089 | Gaithersburg | DC |
| 240 | 239-0089 | Leonardtown | DC |
| 240 | 279-0089 | Waldorf | DC |
| Area Code | Phone Number | City | State |
| 240 | 336-0089 | Bethesda | DC |
| 240 | 325-0089 | Damascus | DC |
| 240 | 327-0089 | Gaithersburg | DC |
| 240 | 239-0089 | Leonardtown | DC |
| 240 | 279-0089 | Waldorf | DC |