| Start Date | 05/02/2001 |
| Current Time in Area Code 339 | 339> EDT |
| Timezone | Eastern Daylight Time |
| Regional Market Area | Metro Boston |
| Metro Area(s) | Boston-Cambridge-Newton, MA-NH |
| Population (2020) | 1256800 |
| Adjacent Area Codes | 351,508,617,774,781,857,978 |
| Overlay Area Codes | 781 |
| Norfolk County |
| Plymouth County |
| Arlington |
| Braintree Town |
| Lexington |
| Lynn |
| Malden |
| Medford |
| Needham |
| Randolph Town |
| Revere |
| Waltham |
| Weymouth Town |
| Woburn |