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zipcodes.pro — ZIP/16603

16603

ZIP 16603 is in Altoona, Pennsylvania, in Blair County; area codes 814 and 582; Eastern time. Altoona has 3 ZIP codes; the others are 16601 and 16602.

Type
No street area
Time zone
America/New_York
County
Blair
Metro area
Altoona, PA
Coordinates
40.5018, -78.4100

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 16601, whose figures describe that area — not this ZIP code.

☼ Live from 16603 — Altoona, PA

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Where 16603 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 16603
  • 🔢 Type 16603 into a pocket calculator and turn it upside down: EOggI — not quite a word, sorry.
  • ➕ 16603 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 16, a total 1,922 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100000011011011
  • 🏠 Its numerical neighbours: 16602 (Altoona, PA, 1 mi away) and 16611 (Alexandria, PA, 17 mi away).
  • 🔄 Backwards, 16603 becomes 30661, which is not a ZIP code at all.
  • 👥 32 other ZIP codes are made of exactly the same digits (01366, 13066, 13606, 13660, 16036, 16063, …). The farthest-flung twin is 66031 in New Century, KS, 883 miles away.
  • 🧭 Farther north than 61% of all ZIP codes, and farther east than 78%.
  • 🎯1,064 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 16603 and you would come out at 40.50°S, 101.59°E — 989 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 04m of daylight. Shortest: 9h 16m.
🌙 The sky over 16603 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments22This ZIP22
Employees436This ZIP436
Annual payroll$21,154,000This ZIP$21,154,000

Land area

ZIP codes near 16603

ZIPCityDistance
16602 Altoona, PA 1.3 mi
16601 Altoona, PA 4.0 mi
16648 Hollidaysburg, PA 5.8 mi
16629 Coupon, PA 6.3 mi
16613 Ashville, PA 6.9 mi
16635 Duncansville, PA 7.4 mi
16665 Newry, PA 7.9 mi
16617 Bellwood, PA 8.2 mi
16636 Dysart, PA 8.3 mi
16641 Gallitzin, PA 8.5 mi

Find every ZIP code within 10 miles of 16603 →

Questions about this ZIP code

Where is ZIP code 16603?

16603 is in Altoona, Pennsylvania, in Blair County, part of the Altoona, PA metropolitan area. Its published point location is 40.5018, -78.4100.

What county is 16603 in?

16603 lies in Blair County.

What area code is 16603?

Altoona uses area codes 814 and 582, from NANPA's telephone records.

What time zone is 16603 in?

16603 uses America/New_York.

What ZIP codes are near 16603?

The closest are 16602 (1.3 mi), 16601 (4 mi), 16648 (5.8 mi), 16629 (6.3 mi) and 16613 (6.9 mi).

Is 16603 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. “16603 ZIP Code — Altoona, Pennsylvania (Blair County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/16603

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