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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/03753

03753

ZIP 03753 is Grantham, New Hampshire, in Sullivan County; area code 603; Eastern time.

Type
Standard
Time zone
America/New_York
County
Sullivan
Population
3,509
Coordinates
43.5166, -72.1491
☼ Live from 03753 — Grantham, NH

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Where 03753 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 03753
  • 🔢 Type 03753 into a pocket calculator and turn it upside down: ESLEO — not quite a word, sorry.
  • ➕ As a number, 3,753 = 3 × 3 × 3 × 139. Its digits add up to 18, a total 2,332 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 111010101001
  • 🏠 Its numerical neighbours: 03752 (Goshen, NH, 17 mi away) and 03754 (Guild, NH, 10 mi away).
  • 🔄 Backwards, 03753 becomes 35730, which is not a ZIP code at all.
  • 👥 27 other ZIP codes are made of exactly the same digits (05733, 07533, 30357, 30375, 30537, 30573, …). The farthest-flung twin is 73530 in Davidson, OK, 1,573 miles away.
  • 🧭 Farther north than 85% of all ZIP codes, and farther east than 94%.
  • 🎯1,382 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 03753 and you would come out at 43.52°S, 107.85°E — 910 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 26m of daylight. Shortest: 8h 56m.
  • 📏 At 28.2 square miles of land, 03753 is bigger than 44% of ZIP codes — room for about 21 Central Parks.
🌙 The sky over 03753 today
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🌋 Shake report
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Source: USGS.

People and housing

Population3,509This ZIP3,509
Households1,449This ZIP1,449
Housing units2,365This ZIP2,365
Median age50.3This ZIP50.3New Hampshire43.3US 38.9
Median household income$106,285This ZIP$106,285New Hampshire$99,031US $80,734
Median home value$343,900This ZIP$343,900New Hampshire$402,500US $332,700
Bachelor's degree or higher59.4%This ZIP59.4%
Mean commute22.5 minThis ZIP22.5 min
Population density124.3 / sq miThis ZIP124.3 / sq mi

Business and tax activity

Business establishments49This ZIP49
Employees242This ZIP242
Annual payroll$10,626,000This ZIP$10,626,000
Tax returns filed1,990This ZIP1,990
Total adjusted gross income$292,746,000This ZIP$292,746,000

Land area

Land area28.23 sq miThis ZIP28.23 sq mi
Water area0.85 sq miThis ZIP0.85 sq mi

ZIP codes near 03753

ZIPCityDistance
03749 Enfield Center, NH 5.4 mi
03770 Meriden, NH 5.6 mi
03748 Enfield, NH 6.2 mi
03751 Georges Mills, NH 6.2 mi
03746 Cornish Flat, NH 6.7 mi
03284 Springfield, NH 7.5 mi
03781 Plainfield, NH 8.1 mi
03745 Cornish, NH 8.7 mi
03766 Lebanon, NH 9.1 mi
03782 Sunapee, NH 9.2 mi

Find every ZIP code within 10 miles of 03753 →

Questions about this ZIP code

Where is ZIP code 03753?

03753 is in Grantham, New Hampshire, in Sullivan County, part of the Lebanon-Claremont, NH-VT micropolitan area. Its published point location is 43.5166, -72.1491.

What county is 03753 in?

03753 lies in Sullivan County.

What area code is 03753?

Grantham uses area code 603, from NANPA's telephone records.

What time zone is 03753 in?

03753 uses America/New_York.

How many people live in 03753?

About 3,509 people live in ZIP code 03753, in 1,449 households, at 124.3 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 03753?

$106,285 a year, against $99,031 across New Hampshire.

What ZIP codes are near 03753?

The closest are 03749 (5.4 mi), 03770 (5.6 mi), 03748 (6.2 mi), 03751 (6.2 mi) and 03746 (6.7 mi).

Is 03753 a PO Box ZIP code?

03753 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “03753 ZIP Code — Grantham, New Hampshire (Sullivan County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/03753

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