75121

ZIP 75121 is Copeville, Texas, in Collin County; area codes 469, 972 and 945; Central time.

Type: No street area
Time zone: America/Chicago
County: Collin
Metro area: Dallas-Fort Worth-Arlington, TX
Coordinates: 33.0875, -96.4186

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 75173, whose figures describe that area — not this ZIP code.

☼ Live from 75121 — Copeville, TX

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Where 75121 is

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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 75121

🔢 Type 75121 into a pocket calculator and turn it upside down: IZISL — not quite a word, sorry.
➕ As a number, 75,121 = 43 × 1747. Its digits add up to 16, a total 1,922 other ZIP codes share.
💾In binary, the way a computer stores it: 10010010101110001
🏠 Its numerical neighbours: 75120 (Ennis, TX, 53 mi away) and 75123 (Desoto, TX, 43 mi away).
🔄 Backwards, 75121 becomes 12157 — and that is a real ZIP code: Schoharie, NY, 1,371 miles away.
👥 27 other ZIP codes are made of exactly the same digits (11572, 11725, 11752, 12157, 12175, 12517, …). The farthest-flung twin is 12517 in Copake Falls, NY, 1,395 miles away.
🧭 Farther south than 84% of all ZIP codes, and farther west than 72%.
🎯481 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
🌏 Dig straight through the Earth from 75121 and you would come out at 33.09°S, 83.58°E — 1,316 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
☀Longest day of the year: 14h 20m of daylight. Shortest: 9h 58m.

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Land area

ZIP codes near 75121

ZIP	City	Distance
`75173`	Nevada, TX	2.2 mi
`75166`	Lavon, TX	5.3 mi
`75407`	Princeton, TX	5.9 mi
`75164`	Josephine, TX	6.7 mi
`75442`	Farmersville, TX	7.4 mi
`75098`	Wylie, TX	8.4 mi
`75087`	Rockwall, TX	9.7 mi
`75132`	Fate, TX	10.5 mi
`75002`	Allen, TX	11.0 mi
`75135`	Caddo Mills, TX	11.3 mi

Find every ZIP code within 10 miles of 75121 →

Questions about this ZIP code

Where is ZIP code 75121?

75121 is in Copeville, Texas, in Collin County, part of the Dallas-Fort Worth-Arlington, TX metropolitan area. Its published point location is 33.0875, -96.4186.

What county is 75121 in?

75121 lies in Collin County.

What area code is 75121?

Copeville uses area codes 469, 972 and 945, from NANPA's telephone records.

What time zone is 75121 in?

75121 uses America/Chicago.

What ZIP codes are near 75121?

The closest are 75173 (2.2 mi), 75166 (5.3 mi), 75407 (5.9 mi), 75164 (6.7 mi) and 75442 (7.4 mi).

Is 75121 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. “75121 ZIP Code — Copeville, Texas (Collin County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/75121

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/75121.json

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