About ZIP code 01821
The ZIP code 01821 routes mail to Billerica in the Massachusetts region of United States. Use it as the postal segment of any address in this area, and confirm unusual addresses with the local postal operator.
United States ยท ZIP code
01821 - Billerica
ZIP code 01821 is Billerica in Massachusetts, United States.
| ZIP code | 01821 |
| Place | Billerica |
| Region | Massachusetts |
| District | Middlesex |
| Country | United States (US) |
| Coordinates | 42.5519, -71.2518 (map) |