Postal reference
ZIP 01821, Massachusetts
ZIP code 01821 is associated with Billerica in Massachusetts in the GeoNames postal reference.
Reference details
- State
- Massachusetts (MA)
- ZIP code
- 01821
- Associated localities
- Billerica
- County names in postal records
- Middlesex
- Approximate postal point
- 42.5519, -71.2518
View point on map ↗
Postal information is adapted from GeoNames, CC BY 4.0. Locality associations and coordinates are approximate, not ZIP boundaries or a guarantee of current mail delivery.