US Area Code
240
Suburban Maryland · Maryland
Area code 240 serves Rockville, Bethesda, Gaithersburg and surrounding areas in Maryland. Look up any 240 number below to check for spam, see caller ID, carrier, and line type.
Area Code Details
- State / Territory
- Maryland
- Region
- Suburban Maryland
- Major Cities
- Rockville, Bethesda, Gaithersburg
- Timezone
- Eastern Time
- Country
- United States
- Format
- +1 (240) XXX-XXXX