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/77643

77643

ZIP 77643 is in Port Arthur, Texas, in Jefferson County; area code 409; Central time. Port Arthur has 4 ZIP codes; the others are 77640, 77641 and 77642.

Type
No street area
Time zone
America/Chicago
County
Jefferson
Coordinates
29.9621, -93.8679

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 77642, whose figures describe that area — not this ZIP code.

☼ Live from 77643 — Port Arthur, TX

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Where 77643 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 77643
  • 🔢 Type 77643 into a pocket calculator and turn it upside down: EhgLL — not quite a word, sorry.
  • ➕ As a number, 77,643 = 3 × 3 × 8627. Its digits add up to 27, a total 1,806 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10010111101001011
  • 🏠 Its numerical neighbours: 77642 (Port Arthur, TX, 1 mi away) and 77650 (Port Bolivar, TX, 60 mi away).
  • 🔄 Backwards, 77643 becomes 34677 — and that is a real ZIP code: Oldsmar, FL, 689 miles away.
  • 👥 29 other ZIP codes are made of exactly the same digits (34677, 36477, 37764, 43767, 46377, 46737, …). The farthest-flung twin is 43767 in Norwich, OH, 972 miles away.
  • 🧭 Farther south than 93% of all ZIP codes, and farther west than 66%.
  • 🎯732 miles southeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 77643 and you would come out at 29.96°S, 86.13°E — 1,408 miles from West Island, Cocos Islands, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 04m of daylight. Shortest: 10h 13m.
🌙 The sky over 77643 today
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Source: USGS.

Business and tax activity

Business establishments6This ZIP6
Employees158This ZIP158
Annual payroll$12,240,000This ZIP$12,240,000

Land area

ZIP codes near 77643

ZIPCityDistance
77642 Port Arthur, TX 1.5 mi
77619 Groves, TX 3.1 mi
77611 Bridge City, TX 4.3 mi
77651 Port Neches, TX 5.0 mi
77639 Orangefield, TX 7.0 mi
77640 Port Arthur, TX 7.1 mi
77630 Orange, TX 7.2 mi
77627 Nederland, TX 8.6 mi
77631 Orange, TX 12.0 mi
77670 Vidor, TX 14.7 mi

Find every ZIP code within 10 miles of 77643 →

Questions about this ZIP code

Where is ZIP code 77643?

77643 is in Port Arthur, Texas, in Jefferson County, part of the Beaumont-Port Arthur, TX metropolitan area. Its published point location is 29.9621, -93.8679.

What county is 77643 in?

77643 lies in Jefferson County.

What area code is 77643?

Port Arthur uses area code 409, from NANPA's telephone records.

What time zone is 77643 in?

77643 uses America/Chicago.

What ZIP codes are near 77643?

The closest are 77642 (1.5 mi), 77619 (3.1 mi), 77611 (4.3 mi), 77651 (5 mi) and 77639 (7 mi).

Is 77643 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. “77643 ZIP Code — Port Arthur, Texas (Jefferson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/77643

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