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/16103

16103

ZIP 16103 is in New Castle, Pennsylvania, in Lawrence County; area codes 724 and 878; Eastern time. New Castle has 6 ZIP codes; the others are 16101, 16102, 16105, 16107 and 16108.

Type
No street area
Time zone
America/New_York
County
Lawrence
Metro area
Pittsburgh, PA
Coordinates
40.9897, -80.3084

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 16101, whose figures describe that area — not this ZIP code.

☼ Live from 16103 — New Castle, PA

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Where 16103 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 16103
  • 🔢 Type 16103 into a pocket calculator and turn it upside down: EOIgI — not quite a word, sorry.
  • ➕ 16103 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: 11111011100111
  • 🏠 Its numerical neighbours: 16102 (New Castle, PA, 6 mi away) and 16105 (New Castle, PA, 5 mi away).
  • 🔄 Backwards, 16103 becomes 30161 — and that is a real ZIP code: Rome, GA, 537 miles away.
  • 👥 28 other ZIP codes are made of exactly the same digits (01613, 06131, 10163, 11360, 13061, 13160, …). The farthest-flung twin is 31601 in Valdosta, GA, 726 miles away.
  • 🧭 Farther north than 67% of all ZIP codes, and farther east than 72%.
  • 🎯963 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 16103 and you would come out at 40.99°S, 99.69°E — 1,091 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 08m of daylight. Shortest: 9h 13m.
🌙 The sky over 16103 today
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Source: USGS.

Business and tax activity

Business establishments8This ZIP8
Employees100This ZIP100
Annual payroll$3,983,000This ZIP$3,983,000

Land area

ZIP codes near 16103

ZIPCityDistance
16107 New Castle, PA 0.0 mi
16108 New Castle, PA 0.0 mi
16101 New Castle, PA 1.0 mi
16105 New Castle, PA 4.7 mi
16160 West Pittsburg, PA 5.1 mi
16102 New Castle, PA 5.9 mi
16157 Wampum, PA 7.1 mi
16116 Edinburg, PA 8.3 mi
16117 Ellwood City, PA 8.6 mi
16156 Volant, PA 8.6 mi

Find every ZIP code within 10 miles of 16103 →

Questions about this ZIP code

Where is ZIP code 16103?

16103 is in New Castle, Pennsylvania, in Lawrence County, part of the Pittsburgh, PA metropolitan area. Its published point location is 40.9897, -80.3084.

What county is 16103 in?

16103 lies in Lawrence County.

What area code is 16103?

New Castle uses area codes 724 and 878, from NANPA's telephone records.

What time zone is 16103 in?

16103 uses America/New_York.

What ZIP codes are near 16103?

The closest are 16107 (0 mi), 16108 (0 mi), 16101 (1 mi), 16105 (4.7 mi) and 16160 (5.1 mi).

Is 16103 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. “16103 ZIP Code — New Castle, Pennsylvania (Lawrence County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/16103

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curl https://zipcodes.pro/zip/16103.json

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