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/31521

31521

ZIP 31521 is in Brunswick, Georgia, in Glynn County; area code 912; Eastern time. Brunswick has 5 ZIP codes; the others are 31520, 31523, 31524 and 31525.

Type
No street area
Time zone
America/New_York
County
Glynn
Coordinates
31.1500, -81.4915

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 31520, whose figures describe that area — not this ZIP code.

☼ Live from 31521 — Brunswick, GA

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Where 31521 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 31521
  • 🔢 Type 31521 into a pocket calculator and turn it upside down: IZSIE — not quite a word, sorry.
  • ➕ As a number, 31,521 = 3 × 7 × 19 × 79. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 111101100100001
  • 🏠 Its numerical neighbours: 31520 (Brunswick, GA, 2 mi away) and 31522 (Saint Simons Island, GA, 12 mi away).
  • 🔄 Backwards, 31521 becomes 12513 — and that is a real ZIP code: Claverack, NY, 877 miles away.
  • 👥 29 other ZIP codes are made of exactly the same digits (11235, 11352, 12153, 12513, 12531, 13152, …). The farthest-flung twin is 51231 in Archer, IA, 1,136 miles away.
  • 🧭 Farther south than 90% of all ZIP codes, and farther east than 69%.
  • 🎯1,130 miles southeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 31521 and you would come out at 31.15°S, 98.51°E — 1,022 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 10m of daylight. Shortest: 10h 07m.
🌙 The sky over 31521 today
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Source: USGS.

Business and tax activity

Business establishments18This ZIP18
Employees299This ZIP299
Annual payroll$13,909,000This ZIP$13,909,000

Land area

ZIP codes near 31521

ZIPCityDistance
31520 Brunswick, GA 2.0 mi
31524 Brunswick, GA 6.4 mi
31527 Jekyll Island, GA 6.8 mi
31523 Brunswick, GA 8.6 mi
31565 Waverly, GA 10.5 mi
31561 Sea Island, GA 11.5 mi
31522 Saint Simons Island, GA 11.5 mi
31525 Brunswick, GA 12.0 mi
31305 Darien, GA 16.5 mi
31566 Waynesville, GA 18.7 mi

Find every ZIP code within 10 miles of 31521 →

Questions about this ZIP code

Where is ZIP code 31521?

31521 is in Brunswick, Georgia, in Glynn County, part of the Brunswick-St. Simons, GA metropolitan area. Its published point location is 31.1500, -81.4915.

What county is 31521 in?

31521 lies in Glynn County.

What area code is 31521?

Brunswick uses area code 912, from NANPA's telephone records.

What time zone is 31521 in?

31521 uses America/New_York.

What ZIP codes are near 31521?

The closest are 31520 (2 mi), 31524 (6.4 mi), 31527 (6.8 mi), 31523 (8.6 mi) and 31565 (10.5 mi).

Is 31521 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. “31521 ZIP Code — Brunswick, Georgia (Glynn County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/31521

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/31521.json

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