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/19899

19899

ZIP 19899 is in Wilmington, Delaware, in New Castle County; area code 302; Eastern time. Wilmington has 25 ZIP codes in all.

Type
No street area
Time zone
America/New_York
County
New Castle
Coordinates
39.7459, -75.5466

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 19801, whose figures describe that area — not this ZIP code.

☼ Live from 19899 — Wilmington, DE

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Local time: —

Where 19899 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 19899
  • 🔢 Type 19899 into a pocket calculator and turn it upside down: GGBGI — not quite a word, sorry.
  • ➕ As a number, 19,899 = 3 × 3 × 3 × 11 × 67. Its digits add up to 36, a total 149 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100110110111011
  • 🏠 Its numerical neighbours: 19898 (Wilmington, DE, 0 mi away) and 19901 (Dover, DE, 39 mi away).
  • 🔄 Backwards, 19899 becomes 99891, which is not a ZIP code at all.
  • 👥 4 other ZIP codes are made of exactly the same digits (89199, 91899, 98199, 99918). The farthest-flung twin is 99918 in Coffman Cove, AK, 2,781 miles away.
  • 🧭 Farther north than 54% of all ZIP codes, and farther east than 86%.
  • 🎯1,220 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 19899 and you would come out at 39.75°S, 104.45°E — 834 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 59m of daylight. Shortest: 9h 21m.
🌙 The sky over 19899 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments77This ZIP77
Employees1,024This ZIP1,024
Annual payroll$124,306,000This ZIP$124,306,000

Land area

ZIP codes near 19899

ZIPCityDistance
19884 Wilmington, DE 0.0 mi
19885 Wilmington, DE 0.0 mi
19886 Wilmington, DE 0.0 mi
19893 Wilmington, DE 0.0 mi
19894 Wilmington, DE 0.0 mi
19895 Wilmington, DE 0.0 mi
19898 Wilmington, DE 0.0 mi
19802 Wilmington, DE 1.2 mi
19806 Wilmington, DE 1.5 mi
19801 Wilmington, DE 1.6 mi

Find every ZIP code within 10 miles of 19899 →

Questions about this ZIP code

Where is ZIP code 19899?

19899 is in Wilmington, Delaware, in New Castle County, part of the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metropolitan area. Its published point location is 39.7459, -75.5466.

What county is 19899 in?

19899 lies in New Castle County.

What area code is 19899?

Wilmington uses area code 302, from NANPA's telephone records.

What time zone is 19899 in?

19899 uses America/New_York.

What ZIP codes are near 19899?

The closest are 19884 (0 mi), 19885 (0 mi), 19886 (0 mi), 19893 (0 mi) and 19894 (0 mi).

Is 19899 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. “19899 ZIP Code — Wilmington, Delaware (New Castle County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/19899

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