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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/73536

73536

ZIP 73536 is in Duncan, Oklahoma, in Stephens County; area code 580; Central time. Duncan has 3 ZIP codes; the others are 73533 and 73534.

Type
No street area
Time zone
America/Chicago
County
Stephens
Metro area
Duncan, OK
Coordinates
34.4853, -97.8522

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 73533, whose figures describe that area — not this ZIP code.

☼ Live from 73536 — Duncan, OK

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Where 73536 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 73536
  • 🔢 Type 73536 into a pocket calculator and turn it upside down: gESEL — not quite a word, sorry.
  • ➕ As a number, 73,536 = 2 × 2 × 2 × 2 × 2 × 2 × 3 × 383. Its digits add up to 24, a total 2,425 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10001111101000000
  • 🏠 Its numerical neighbours: 73534 (Duncan, OK, 7 mi away) and 73537 (Eldorado, OK, 104 mi away).
  • 🔄 Backwards, 73536 becomes 63537 — and that is a real ZIP code: Edina, MO, 501 miles away.
  • 👥 25 other ZIP codes are made of exactly the same digits (33567, 33576, 33675, 33756, 33765, 35673, …). The farthest-flung twin is 33567 in Plant City, FL, 1,033 miles away.
  • 🧭 Farther south than 76% of all ZIP codes, and farther west than 77%.
  • 🎯371 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 73536 and you would come out at 34.49°S, 82.15°E — 1,193 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 28m of daylight. Shortest: 9h 51m.
🌙 The sky over 73536 today
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Source: USGS.

Land area

ZIP codes near 73536

ZIPCityDistance
73533 Duncan, OK 1.6 mi
73534 Duncan, OK 7.3 mi
73491 Velma, OK 11.0 mi
73529 Comanche, OK 11.7 mi
73055 Marlow, OK 11.8 mi
73442 Loco, OK 14.6 mi
73425 Countyline, OK 16.1 mi
73520 Addington, OK 16.6 mi
73488 Tussy, OK 16.9 mi
73434 Foster, OK 18.1 mi

Find every ZIP code within 10 miles of 73536 →

Questions about this ZIP code

Where is ZIP code 73536?

73536 is in Duncan, Oklahoma, in Stephens County, part of the Duncan, OK micropolitan area. Its published point location is 34.4853, -97.8522.

What county is 73536 in?

73536 lies in Stephens County.

What area code is 73536?

Duncan uses area code 580, from NANPA's telephone records.

What time zone is 73536 in?

73536 uses America/Chicago.

What ZIP codes are near 73536?

The closest are 73533 (1.6 mi), 73534 (7.3 mi), 73491 (11 mi), 73529 (11.7 mi) and 73055 (11.8 mi).

Is 73536 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. “73536 ZIP Code — Duncan, Oklahoma (Stephens County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/73536

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