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/78403

78403

ZIP 78403 is in Corpus Christi, Texas, in Nueces County; area code 361; Central time. Corpus Christi has 30 ZIP codes in all.

Type
No street area
Time zone
America/Chicago
County
Nueces
Metro area
Corpus Christi, TX
Coordinates
27.7770, -97.4632

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 78406, whose figures describe that area — not this ZIP code.

☼ Live from 78403 — Corpus Christi, TX

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Where 78403 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 78403
  • 🔢 Type 78403 into a pocket calculator and turn it upside down: EOhBL — not quite a word, sorry.
  • ➕ As a number, 78,403 = 13 × 37 × 163. Its digits add up to 22, a total 2,607 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011001001000011
  • 🏠 Its numerical neighbours: 78402 (Corpus Christi, TX, 5 mi away) and 78404 (Corpus Christi, TX, 4 mi away).
  • 🔄 Backwards, 78403 becomes 30487, which is not a ZIP code at all.
  • 👥 53 other ZIP codes are made of exactly the same digits (03748, 03784, 03847, 03874, 04738, 04783, …). The farthest-flung twin is 04783 in Stockholm, ME, 2,065 miles away.
  • 🧭 Farther south than 97% of all ZIP codes, and farther west than 75%.
  • 🎯835 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 78403 and you would come out at 27.78°S, 82.54°E — 1,420 miles from West Island, Cocos Islands, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 54m of daylight. Shortest: 10h 23m.
🌙 The sky over 78403 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments16This ZIP16
Employees1,314This ZIP1,314
Annual payroll$189,635,000This ZIP$189,635,000

Land area

ZIP codes near 78403

ZIPCityDistance
78426 Corpus Christi, TX 0.0 mi
78463 Corpus Christi, TX 0.0 mi
78465 Corpus Christi, TX 0.0 mi
78466 Corpus Christi, TX 0.0 mi
78467 Corpus Christi, TX 0.0 mi
78468 Corpus Christi, TX 0.0 mi
78469 Corpus Christi, TX 0.0 mi
78480 Corpus Christi, TX 0.0 mi
78405 Corpus Christi, TX 1.5 mi
78408 Corpus Christi, TX 2.0 mi

Find every ZIP code within 10 miles of 78403 →

Questions about this ZIP code

Where is ZIP code 78403?

78403 is in Corpus Christi, Texas, in Nueces County, part of the Corpus Christi, TX metropolitan area. Its published point location is 27.7770, -97.4632.

What county is 78403 in?

78403 lies in Nueces County.

What area code is 78403?

Corpus Christi uses area code 361, from NANPA's telephone records.

What time zone is 78403 in?

78403 uses America/Chicago.

What ZIP codes are near 78403?

The closest are 78426 (0 mi), 78463 (0 mi), 78465 (0 mi), 78466 (0 mi) and 78467 (0 mi).

Is 78403 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. “78403 ZIP Code — Corpus Christi, Texas (Nueces County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78403

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