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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/91987

91987

ZIP 91987 is in Tecate, California, in San Diego County; area codes 619 and 858; Pacific time. Tecate has 2 ZIP codes; the other is 91980.

Type
No street area
Time zone
America/Los_Angeles
County
San Diego
Coordinates
32.5773, -116.6275

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 91980, whose figures describe that area — not this ZIP code.

☼ Live from 91987 — Tecate, CA

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Where 91987 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 91987
  • 🔢 Type 91987 into a pocket calculator and turn it upside down: LBGIG — not quite a word, sorry.
  • ➕ As a number, 91,987 = 7 × 17 × 773. Its digits add up to 34, a total 322 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110011101010011
  • 🏠 Its numerical neighbours: 91980 (Tecate, CA, 1 mi away) and 92003 (Bonsall, CA, 59 mi away).
  • 🔄 Backwards, 91987 becomes 78919, which is not a ZIP code at all.
  • 👥 12 other ZIP codes are made of exactly the same digits (18979, 19897, 71998, 79189, 79918, 87199, …). The farthest-flung twin is 99781 in Venetie, AK, 2,686 miles away.
  • 🧭 Farther south than 86% of all ZIP codes, and farther west than 89%.
  • 🎯1,121 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91987 and you would come out at 32.58°S, 63.37°E — 931 miles from Port Louis, Mauritius, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 18m of daylight. Shortest: 10h 00m.
🌙 The sky over 91987 today
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Source: USGS.

Land area

ZIP codes near 91987

ZIPCityDistance
91980 Tecate, CA 0.6 mi
91963 Potrero, CA 5.2 mi
91917 Dulzura, CA 8.6 mi
91906 Campo, CA 10.4 mi
91935 Jamul, CA 11.8 mi
91901 Alpine, CA 17.3 mi
92179 San Diego, CA 17.8 mi
91931 Guatay, CA 18.2 mi
91915 Chula Vista, CA 19.0 mi
91978 Spring Valley, CA 19.6 mi

Find every ZIP code within 10 miles of 91987 →

Questions about this ZIP code

Where is ZIP code 91987?

91987 is in Tecate, California, in San Diego County, part of the San Diego-Chula Vista-Carlsbad, CA metropolitan area. Its published point location is 32.5773, -116.6275.

What county is 91987 in?

91987 lies in San Diego County.

What area code is 91987?

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

What time zone is 91987 in?

91987 uses America/Los_Angeles.

What ZIP codes are near 91987?

The closest are 91980 (0.6 mi), 91963 (5.2 mi), 91917 (8.6 mi), 91906 (10.4 mi) and 91935 (11.8 mi).

Is 91987 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. “91987 ZIP Code — Tecate, California (San Diego County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91987

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/91987.json

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