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zipcodes.pro — ZIP/01721

01721

ZIP 01721 is Ashland, Massachusetts, in Middlesex County; area codes 508 and 774; Eastern time.

Type
Standard
Time zone
America/New_York
County
Middlesex
Population
18,873
Coordinates
42.2578, -71.4735
☼ Live from 01721 — Ashland, MA

Weather right now

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NEXRAD radar
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Local time: —

Where 01721 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 01721
  • 🔢 Type 01721 into a pocket calculator and turn it upside down: IZLIO — not quite a word, sorry.
  • ➕ 01721 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 11, a total 714 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11010111001
  • 🏠 Its numerical neighbours: 01720 (Acton, MA, 16 mi away) and 01730 (Bedford, MA, 19 mi away).
  • 🔄 Backwards, 01721 becomes 12710, which is not a ZIP code at all.
  • 👥 40 other ZIP codes are made of exactly the same digits (02117, 02171, 07112, 10172, 10271, 11027, …). The farthest-flung twin is 71102 in Shreveport, LA, 1,386 miles away.
  • 🧭 Farther north than 77% of all ZIP codes, and farther east than 95%.
  • 🎯1,416 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 01721 and you would come out at 42.26°S, 108.53°E — 818 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 16m of daylight. Shortest: 9h 05m.
  • 📏 At 12.3 square miles of land, 01721 is bigger than 30% of ZIP codes — room for about 9.4 Central Parks.
🌙 The sky over 01721 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population18,873This ZIP18,873
Households7,643This ZIP7,643
Housing units8,094This ZIP8,094
Median age42.1This ZIP42.1Massachusetts40.0US 38.9
Median household income$127,539This ZIP$127,539Massachusetts$103,960US $80,734
Median home value$611,700This ZIP$611,700Massachusetts$562,100US $332,700
Median gross rent$2,452This ZIP$2,452Massachusetts$1,762US $1,413
Bachelor's degree or higher60.7%This ZIP60.7%
Mean commute36.8 minThis ZIP36.8 min
Population density1,529.7 / sq miThis ZIP1,529.7 / sq mi

Business and tax activity

Business establishments438This ZIP438
Employees4,438This ZIP4,438
Annual payroll$249,566,000This ZIP$249,566,000
Tax returns filed9,500This ZIP9,500
Total adjusted gross income$1,274,639,000This ZIP$1,274,639,000

Land area

Land area12.34 sq miThis ZIP12.34 sq mi
Water area0.54 sq miThis ZIP0.54 sq mi

ZIP codes near 01721

ZIPCityDistance
01702 Framingham, MA 2.5 mi
01745 Fayville, MA 2.7 mi
01748 Hopkinton, MA 4.1 mi
01772 Southborough, MA 4.3 mi
01746 Holliston, MA 4.4 mi
01701 Framingham, MA 4.6 mi
01784 Woodville, MA 4.7 mi
01770 Sherborn, MA 5.4 mi
01760 Natick, MA 6.6 mi
01581 Westborough, MA 7.2 mi

Find every ZIP code within 10 miles of 01721 →

Questions about this ZIP code

Where is ZIP code 01721?

01721 is in Ashland, Massachusetts, in Middlesex County, part of the Boston-Cambridge-Newton, MA-NH metropolitan area. Its published point location is 42.2578, -71.4735.

What county is 01721 in?

01721 lies in Middlesex County.

What area code is 01721?

Ashland uses area codes 508 and 774, from NANPA's telephone records.

What time zone is 01721 in?

01721 uses America/New_York.

How many people live in 01721?

About 18,873 people live in ZIP code 01721, in 7,643 households, at 1,529.7 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 01721?

$127,539 a year, against $103,960 across Massachusetts.

What ZIP codes are near 01721?

The closest are 01702 (2.5 mi), 01745 (2.7 mi), 01748 (4.1 mi), 01772 (4.3 mi) and 01746 (4.4 mi).

Is 01721 a PO Box ZIP code?

01721 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “01721 ZIP Code — Ashland, Massachusetts (Middlesex County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/01721

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