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/37940

37940

ZIP 37940 is in Knoxville, Tennessee, in Knox County; area code 865; Eastern time. Knoxville has 31 ZIP codes in all.

Type
No street area
Time zone
America/New_York
County
Knox
Metro area
Knoxville, TN
Coordinates
35.9901, -83.9622

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 37921, whose figures describe that area — not this ZIP code.

☼ Live from 37940 — Knoxville, TN

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Where 37940 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 37940
  • 🔢 Type 37940 into a pocket calculator and turn it upside down: OhGLE — not quite a word, sorry.
  • ➕ As a number, 37,940 = 2 × 2 × 5 × 7 × 271. Its digits add up to 23, a total 2,533 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1001010000110100
  • 🏠 Its numerical neighbours: 37939 (Knoxville, TN, 0 mi away) and 37950 (Knoxville, TN, 0 mi away).
  • 🔄 Backwards, 37940 becomes 04973 — and that is a real ZIP code: Searsmont, ME, 969 miles away.
  • 👥 45 other ZIP codes are made of exactly the same digits (03749, 04739, 04937, 04973, 07439, 07934, …). The farthest-flung twin is 09734 in APO AE, a military post office, 7,196 miles away.
  • 🧭 Farther south than 69% of all ZIP codes, and farther east than 60%.
  • 🎯839 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 37940 and you would come out at 35.99°S, 96.04°E — 1,167 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 36m of daylight. Shortest: 9h 43m.
🌙 The sky over 37940 today
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🌋 Shake report
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Source: USGS.

Business and tax activity

Business establishments9This ZIP9
Employees25This ZIP25
Annual payroll$953,000This ZIP$953,000

Land area

ZIP codes near 37940

ZIPCityDistance
37927 Knoxville, TN 0.0 mi
37928 Knoxville, TN 0.0 mi
37933 Knoxville, TN 0.0 mi
37939 Knoxville, TN 0.0 mi
37950 Knoxville, TN 0.0 mi
37996 Knoxville, TN 0.0 mi
37997 Knoxville, TN 0.0 mi
37912 Knoxville, TN 1.8 mi
37921 Knoxville, TN 2.4 mi
37917 Knoxville, TN 2.9 mi

Find every ZIP code within 10 miles of 37940 →

Questions about this ZIP code

Where is ZIP code 37940?

37940 is in Knoxville, Tennessee, in Knox County, part of the Knoxville, TN metropolitan area. Its published point location is 35.9901, -83.9622.

What county is 37940 in?

37940 lies in Knox County.

What area code is 37940?

Knoxville uses area code 865, from NANPA's telephone records.

What time zone is 37940 in?

37940 uses America/New_York.

What ZIP codes are near 37940?

The closest are 37927 (0 mi), 37928 (0 mi), 37933 (0 mi), 37939 (0 mi) and 37950 (0 mi).

Is 37940 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. “37940 ZIP Code — Knoxville, Tennessee (Knox County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/37940

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