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/78381

78381

ZIP 78381 is in Rockport, Texas, in Aransas County; area code 361; Central time. Rockport has 2 ZIP codes; the other is 78382.

Type
No street area
Time zone
America/Chicago
County
Aransas
Metro area
Corpus Christi, TX
Coordinates
28.0131, -97.0936

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 78382, whose figures describe that area — not this ZIP code.

☼ Live from 78381 — Rockport, TX

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 78381 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 78381
  • 🔢 Type 78381 into a pocket calculator and turn it upside down: IBEBL — not quite a word, sorry.
  • ➕ As a number, 78,381 = 3 × 3 × 3 × 2903. Its digits add up to 27, a total 1,806 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011001000101101
  • 🏠 Its numerical neighbours: 78380 (Robstown, TX, 43 mi away) and 78382 (Rockport, TX, 7 mi away).
  • 🔄 Backwards, 78381 becomes 18387, which is not a ZIP code at all.
  • 👥 14 other ZIP codes are made of exactly the same digits (13788, 17883, 18837, 31788, 37188, 37818, …). The farthest-flung twin is 83871 in Troy, ID, 1,675 miles away.
  • 🧭 Farther south than 96% of all ZIP codes, and farther west than 74%.
  • 🎯821 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 78381 and you would come out at 28.01°S, 82.91°E — 1,417 miles from West Island, Cocos Islands, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 55m of daylight. Shortest: 10h 22m.
🌙 The sky over 78381 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments12This ZIP12
Employees70This ZIP70
Annual payroll$2,268,000This ZIP$2,268,000

Land area

ZIP codes near 78381

ZIPCityDistance
78358 Fulton, TX 4.9 mi
78382 Rockport, TX 7.5 mi
78336 Aransas Pass, TX 7.6 mi
78335 Aransas Pass, TX 9.0 mi
78340 Bayside, TX 9.7 mi
78362 Ingleside, TX 12.7 mi
78359 Gregory, TX 13.9 mi
78374 Portland, TX 15.4 mi
78390 Taft, TX 15.6 mi
78373 Port Aransas, TX 16.5 mi

Find every ZIP code within 10 miles of 78381 →

Questions about this ZIP code

Where is ZIP code 78381?

78381 is in Rockport, Texas, in Aransas County, part of the Corpus Christi, TX metropolitan area. Its published point location is 28.0131, -97.0936.

What county is 78381 in?

78381 lies in Aransas County.

What area code is 78381?

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

What time zone is 78381 in?

78381 uses America/Chicago.

What ZIP codes are near 78381?

The closest are 78358 (4.9 mi), 78382 (7.5 mi), 78336 (7.6 mi), 78335 (9 mi) and 78340 (9.7 mi).

Is 78381 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.

Download or cite

Cite this page

zipcodes.pro. “78381 ZIP Code — Rockport, Texas (Aransas County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78381

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/78381.json

Underlying data is public domain or openly licensed — sources, vintages and licences.