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/91944

91944

ZIP 91944 is in La Mesa, California, in San Diego County; area codes 619 and 858; Pacific time. La Mesa has 4 ZIP codes; the others are 91941, 91942 and 91943.

Type
No street area
Time zone
America/Los_Angeles
County
San Diego
Coordinates
32.7678, -117.0231

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 91942, whose figures describe that area — not this ZIP code.

☼ Live from 91944 — La Mesa, CA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 91944 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 91944
  • 🔢 Type 91944 into a pocket calculator and turn it upside down: hhGIG — not quite a word, sorry.
  • ➕ As a number, 91,944 = 2 × 2 × 2 × 3 × 3 × 1277. Its digits add up to 27, a total 1,806 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110011100101000
  • 🏠 Its numerical neighbours: 91943 (La Mesa, CA, 0 mi away) and 91945 (Lemon Grove, CA, 2 mi away).
  • 🔄 Backwards, 91944 becomes 44919, which is not a ZIP code at all.
  • 👥 7 other ZIP codes are made of exactly the same digits (19494, 19944, 44199, 49419, 94914, 94941, …). The farthest-flung twin is 19944 in Fenwick Island, DE, 2,369 miles away.
  • 🧭 Farther south than 85% of all ZIP codes, and farther west than 90%.
  • 🎯1,134 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91944 and you would come out at 32.77°S, 62.98°E — 934 miles from Port Louis, Mauritius, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 19m of daylight. Shortest: 9h 59m.
🌙 The sky over 91944 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments6This ZIP6
Employees12This ZIP12
Annual payroll$305,000This ZIP$305,000

Land area

ZIP codes near 91944

ZIPCityDistance
91943 La Mesa, CA 0.0 mi
91942 La Mesa, CA 0.7 mi
91941 La Mesa, CA 1.6 mi
91946 Lemon Grove, CA 1.8 mi
91976 Spring Valley, CA 2.1 mi
91979 Spring Valley, CA 2.1 mi
91945 Lemon Grove, CA 2.5 mi
92115 San Diego, CA 2.9 mi
92182 San Diego, CA 3.0 mi
91977 Spring Valley, CA 3.3 mi

Find every ZIP code within 10 miles of 91944 →

Questions about this ZIP code

Where is ZIP code 91944?

91944 is in La Mesa, California, in San Diego County, part of the San Diego-Chula Vista-Carlsbad, CA metropolitan area. Its published point location is 32.7678, -117.0231.

What county is 91944 in?

91944 lies in San Diego County.

What area code is 91944?

La Mesa uses area codes 619 and 858, from NANPA's telephone records.

What time zone is 91944 in?

91944 uses America/Los_Angeles.

What ZIP codes are near 91944?

The closest are 91943 (0 mi), 91942 (0.7 mi), 91941 (1.6 mi), 91946 (1.8 mi) and 91976 (2.1 mi).

Is 91944 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. “91944 ZIP Code — La Mesa, California (San Diego County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91944

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/91944.json

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