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/78042

78042

ZIP 78042 is in Laredo, Texas, in Webb County; area code 956; Central time. Laredo has 7 ZIP codes in all.

Type
No street area
Time zone
America/Chicago
County
Webb
Metro area
Laredo, TX
Coordinates
27.5655, -99.4768

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 78041, whose figures describe that area — not this ZIP code.

☼ Live from 78042 — Laredo, TX

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Local time: —

Where 78042 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 78042
  • 🔢 Type 78042 into a pocket calculator and turn it upside down: ZhOBL — not quite a word, sorry.
  • ➕ As a number, 78,042 = 2 × 3 × 13007. Its digits add up to 21, a total 2,594 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011000011011010
  • 🏠 Its numerical neighbours: 78041 (Laredo, TX, 1 mi away) and 78043 (Laredo, TX, 11 mi away).
  • 🔄 Backwards, 78042 becomes 24087 — and that is a real ZIP code: Elliston, VA, 1,302 miles away.
  • 👥 57 other ZIP codes are made of exactly the same digits (02478, 02748, 02874, 04287, 07428, 07842, …). The farthest-flung twin is 04287 in Bowdoin, ME, 1,991 miles away.
  • 🧭 Farther south than 97% of all ZIP codes, and farther west than 79%.
  • 🎯849 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 78042 and you would come out at 27.57°S, 80.52°E — 1,498 miles from West Island, Cocos Islands, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 53m of daylight. Shortest: 10h 24m.
🌙 The sky over 78042 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments29This ZIP29
Employees621This ZIP621
Annual payroll$41,349,000This ZIP$41,349,000

Land area

ZIP codes near 78042

ZIPCityDistance
78041 Laredo, TX 0.9 mi
78040 Laredo, TX 3.9 mi
78043 Laredo, TX 10.6 mi
78046 Laredo, TX 13.5 mi
78044 Laredo, TX 19.0 mi
78045 Laredo, TX 22.4 mi
78371 Oilton, TX 25.0 mi
78369 Mirando City, TX 25.7 mi
78067 San Ygnacio, TX 32.7 mi
78019 Encinal, TX 34.1 mi

Find every ZIP code within 10 miles of 78042 →

Questions about this ZIP code

Where is ZIP code 78042?

78042 is in Laredo, Texas, in Webb County, part of the Laredo, TX metropolitan area. Its published point location is 27.5655, -99.4768.

What county is 78042 in?

78042 lies in Webb County.

What area code is 78042?

Laredo uses area code 956, from NANPA's telephone records.

What time zone is 78042 in?

78042 uses America/Chicago.

What ZIP codes are near 78042?

The closest are 78041 (0.9 mi), 78040 (3.9 mi), 78043 (10.6 mi), 78046 (13.5 mi) and 78044 (19 mi).

Is 78042 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. “78042 ZIP Code — Laredo, Texas (Webb County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78042

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