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/63377

63377

ZIP 63377 is Silex, Missouri, in Lincoln County; area code 573; Central time.

Type
Standard
Time zone
America/Chicago
County
Lincoln
Metro area
St. Louis, MO-IL
Population
3,501
Coordinates
39.1072, -91.0962
☼ Live from 63377 — Silex, MO

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 63377 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 63377
  • 🔢 Type 63377 into a pocket calculator and turn it upside down: LLEEg — not quite a word, sorry.
  • ➕ 63377 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 26, a total 2,038 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1111011110010001
  • 🏠 Its numerical neighbours: 63376 (Saint Peters, MO, 34 mi away) and 63378 (Treloar, MO, 32 mi away).
  • 🔄 Backwards, 63377 becomes 77336 — and that is a real ZIP code: Huffman, TX, 665 miles away.
  • 👥 16 other ZIP codes are made of exactly the same digits (33677, 33767, 33776, 36773, 37367, 37376, …). The farthest-flung twin is 33677 in Tampa, FL, 922 miles away.
  • 🧭 Farther south than 50% of all ZIP codes, and farther west than 59%.
  • 🎯402 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 63377 and you would come out at 39.11°S, 88.90°E — 1,159 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 55m of daylight. Shortest: 9h 25m.
  • 📏 At 129.4 square miles of land, 63377 is bigger than 84% of ZIP codes — room for about 98 Central Parks.
🌙 The sky over 63377 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population3,501This ZIP3,501
Households1,203This ZIP1,203
Housing units1,330This ZIP1,330
Median age43.0This ZIP43.0Missouri39.0US 38.9
Median household income$88,424This ZIP$88,424Missouri$70,702US $80,734
Median home value$233,600This ZIP$233,600Missouri$230,300US $332,700
Median gross rent$879This ZIP$879Missouri$1,033US $1,413
Bachelor's degree or higher21.2%This ZIP21.2%
Mean commute32.9 minThis ZIP32.9 min
Population density27.1 / sq miThis ZIP27.1 / sq mi

Business and tax activity

Business establishments39This ZIP39
Employees280This ZIP280
Annual payroll$11,438,000This ZIP$11,438,000
Tax returns filed1,280This ZIP1,280
Total adjusted gross income$93,619,000This ZIP$93,619,000

Land area

Land area129.43 sq miThis ZIP129.43 sq mi
Water area1.13 sq miThis ZIP1.13 sq mi

Other place names in 63377

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 63377

ZIPCityDistance
63387 Whiteside, MO 6.8 mi
63370 Olney, MO 8.0 mi
63349 Hawk Point, MO 9.0 mi
63379 Troy, MO 9.1 mi
63344 Eolia, MO 9.6 mi
63381 Truxton, MO 11.9 mi
63333 Bellflower, MO 13.0 mi
63359 Middletown, MO 13.8 mi
63343 Elsberry, MO 14.7 mi
63334 Bowling Green, MO 14.8 mi

Find every ZIP code within 10 miles of 63377 →

Questions about this ZIP code

Where is ZIP code 63377?

63377 is in Silex, Missouri, in Lincoln County, part of the St. Louis, MO-IL metropolitan area. Its published point location is 39.1072, -91.0962.

What county is 63377 in?

63377 lies in Lincoln County.

What area code is 63377?

Silex uses area code 573, from NANPA's telephone records.

What time zone is 63377 in?

63377 uses America/Chicago.

How many people live in 63377?

About 3,501 people live in ZIP code 63377, in 1,203 households, at 27.1 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 63377?

$88,424 a year, against $70,702 across Missouri.

What ZIP codes are near 63377?

The closest are 63387 (6.8 mi), 63370 (8 mi), 63349 (9 mi), 63379 (9.1 mi) and 63344 (9.6 mi).

Is 63377 a PO Box ZIP code?

63377 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “63377 ZIP Code — Silex, Missouri (Lincoln County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/63377

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/63377.json

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