Find the last 4 digits (ZIP+4) for an address in 01431

ZIP 01431, Ashby, MA is filled in. Just type the street address.

Addresses are checked through our secure proxy. Bot checks use Cloudflare Turnstile. Each device can run 5 live checks per day; repeats of the same address are free.

ZIP Code 01431 – Ashby, MA

Ashby, Massachusetts · Middlesex County · Eastern time

ZIP code01431
CityAshby
StateMassachusetts
CountyMiddlesex County
Population3,211
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area23.66 sq mi
Center (lat, long)42.6763, -71.8325

Area codes in this area

351978

These are the area codes that most often serve ZIP 01431 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

01474 West Townsend · 4.3 mi01430 Ashburnham · 4.5 mi03071 New Ipswich · 5.3 mi03048 Greenville · 5.8 mi01420 Fitchburg · 6.4 mi01469 Townsend · 7 mi01462 Lunenburg · 8.6 mi01473 Westminster · 9.2 mi

About ZIP 01431

ZIP code 01431 is assigned to Ashby, Massachusetts. It lies in Middlesex County. Its Census area covers about 23.66 square miles of land. The closest neighboring ZIP is 01474 (West Townsend), about 4.3 miles away.

Every address in 01431 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources