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/73403

73403

ZIP 73403 is in Ardmore, Oklahoma, in Carter County; area code 580; Central time. Ardmore has 3 ZIP codes; the others are 73401 and 73402.

Type
No street area
Time zone
America/Chicago
County
Carter
Metro area
Ardmore, OK
Coordinates
34.1743, -97.1436

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 73401, whose figures describe that area — not this ZIP code.

☼ Live from 73403 — Ardmore, OK

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Where 73403 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 73403
  • 🔢 Type 73403 into a pocket calculator and turn it upside down: EOhEL — not quite a word, sorry.
  • ➕ As a number, 73,403 = 11 × 6673. Its digits add up to 17, a total 2,133 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10001111010111011
  • 🏠 Its numerical neighbours: 73402 (Ardmore, OK, 10 mi away) and 73425 (Countyline, OK, 31 mi away).
  • 🔄 Backwards, 73403 becomes 30437, which is not a ZIP code at all.
  • 👥 30 other ZIP codes are made of exactly the same digits (03743, 04733, 30374, 30473, 30734, 33074, …). The farthest-flung twin is 34037 in APO AA, a military post office, 2,515 miles away.
  • 🧭 Farther south than 78% of all ZIP codes, and farther west than 74%.
  • 🎯399 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 73403 and you would come out at 34.17°S, 82.86°E — 1,231 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 26m of daylight. Shortest: 9h 52m.
🌙 The sky over 73403 today
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Source: USGS.

Land area

ZIP codes near 73403

ZIPCityDistance
73401 Ardmore, OK 3.1 mi
73443 Lone Grove, OK 8.9 mi
73436 Gene Autry, OK 9.7 mi
73402 Ardmore, OK 9.9 mi
73453 Overbrook, OK 12.3 mi
73458 Springer, OK 15.5 mi
73448 Marietta, OK 15.8 mi
73032 Dougherty, OK 16.5 mi
73463 Wilson, OK 17.0 mi
73447 Mannsville, OK 17.3 mi

Find every ZIP code within 10 miles of 73403 →

Questions about this ZIP code

Where is ZIP code 73403?

73403 is in Ardmore, Oklahoma, in Carter County, part of the Ardmore, OK micropolitan area. Its published point location is 34.1743, -97.1436.

What county is 73403 in?

73403 lies in Carter County.

What area code is 73403?

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

What time zone is 73403 in?

73403 uses America/Chicago.

What ZIP codes are near 73403?

The closest are 73401 (3.1 mi), 73443 (8.9 mi), 73436 (9.7 mi), 73402 (9.9 mi) and 73453 (12.3 mi).

Is 73403 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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zipcodes.pro. “73403 ZIP Code — Ardmore, Oklahoma (Carter County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/73403

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