Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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/03859

03859

ZIP 03859 is Newton Junction, New Hampshire, in Rockingham County; area code 603; Eastern time.

Type
No street area
Time zone
America/New_York
County
Rockingham
Coordinates
42.8619, -71.0400

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 03858, whose figures describe that area — not this ZIP code.

☼ Live from 03859 — Newton Junction, NH

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Where 03859 is

This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 03859
  • 🔢 Type 03859 into a pocket calculator and turn it upside down: GSBEO — not quite a word, sorry.
  • ➕ As a number, 3,859 = 17 × 227. Its digits add up to 25, a total 2,242 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 111100010011
  • 🏠 Its numerical neighbours: 03858 (Newton, NH, 1 mi away) and 03860 (North Conway, NH, 82 mi away).
  • 🔄 Backwards, 03859 becomes 95830 — and that is a real ZIP code: Sacramento, CA, 2,611 miles away.
  • 👥 43 other ZIP codes are made of exactly the same digits (03589, 03598, 05839, 09358, 09835, 09853, …). The farthest-flung twin is 09853 in APO AE, a military post office, 6,322 miles away.
  • 🧭 Farther north than 82% of all ZIP codes, and farther east than 96%.
  • 🎯1,437 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 03859 and you would come out at 42.86°S, 108.96°E — 843 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 21m of daylight. Shortest: 9h 01m.
🌙 The sky over 03859 today
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Source: USGS.

Business and tax activity

Business establishments4This ZIP4
Employees46This ZIP46
Annual payroll$5,096,000This ZIP$5,096,000

Land area

ZIP codes near 03859

ZIPCityDistance
03858 Newton, NH 0.7 mi
01860 Merrimac, MA 2.1 mi
03865 Plaistow, NH 2.9 mi
03827 East Kingston, NH 3.7 mi
03848 Kingston, NH 4.0 mi
01913 Amesbury, MA 4.3 mi
01830 Haverhill, MA 4.6 mi
03826 East Hampstead, NH 4.9 mi
01985 West Newbury, MA 5.8 mi
03811 Atkinson, NH 6.6 mi

Find every ZIP code within 10 miles of 03859 →

Questions about this ZIP code

Where is ZIP code 03859?

03859 is in Newton Junction, New Hampshire, in Rockingham County, part of the Boston-Cambridge-Newton, MA-NH metropolitan area. Its published point location is 42.8619, -71.0400.

What county is 03859 in?

03859 lies in Rockingham County.

What area code is 03859?

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

What time zone is 03859 in?

03859 uses America/New_York.

What ZIP codes are near 03859?

The closest are 03858 (0.7 mi), 01860 (2.1 mi), 03865 (2.9 mi), 03827 (3.7 mi) and 03848 (4 mi).

Is 03859 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

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Cite this page

zipcodes.pro. “03859 ZIP Code — Newton Junction, New Hampshire (Rockingham County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/03859

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