00978

ZIP 00978 is St Just, Puerto Rico, in Trujillo Alto Municipio; area codes 787 and 939; Atlantic time.

Type: No street area
Time zone: America/Puerto_Rico
County: Trujillo Alto
Metro area: San Juan-Bayamón-Caguas, PR
Coordinates: 18.3786, -66.0500

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 00926, whose figures describe that area — not this ZIP code.

☼ Live from 00978 — St Just, PR

Weather right now

Asking the National Weather Service…

NEXRAD radar

Finding the nearest radar…

Local time: —

Where 00978 is

Loading map… Open 00978 on OpenStreetMap

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 00978

🔢 Type 00978 into a pocket calculator and turn it upside down: BLGOO — not quite a word, sorry.
➕ As a number, 978 = 2 × 3 × 163. Its digits add up to 24, a total 2,425 other ZIP codes share.
💾In binary, the way a computer stores it: 1111010010
🏠 Its numerical neighbours: 00977 (Trujillo Alto, PR, 3 mi away) and 00979 (Carolina, PR, 5 mi away).
🔄 Backwards, 00978 becomes 87900, which is not a ZIP code at all.
👥 23 other ZIP codes are made of exactly the same digits (00987, 07890, 07980, 08079, 08097, 09078, …). The farthest-flung twin is 09078 in APO AE, a military post office, 4,534 miles away.
🧭 Farther south than 99% of all ZIP codes, and farther east than 98%.
🎯2,437 miles southeast of the geographic center of the Lower 48, near Lebanon, Kansas.
🌏 Dig straight through the Earth from 00978 and you would come out at 18.38°S, 113.95°E — 678 miles from Denpasar, Indonesia, the nearest big city to that spot.
☀Longest day of the year: 13h 14m of daylight. Shortest: 11h 01m.

🌙 The sky over 00978 today

Working out the sun…

🌋 Shake report

Checking the USGS…

Source: USGS.

Land area

ZIP codes near 00978

ZIP	City	Distance
`00927`	San Juan, PR	1.5 mi
`00925`	San Juan, PR	1.5 mi
`00926`	San Juan, PR	2.1 mi
`00923`	San Juan, PR	2.4 mi
`00921`	San Juan, PR	2.6 mi
`00924`	San Juan, PR	2.8 mi
`00917`	San Juan, PR	2.9 mi
`00977`	Trujillo Alto, PR	3.2 mi
`00918`	San Juan, PR	3.3 mi
`00968`	Guaynabo, PR	3.9 mi

Find every ZIP code within 10 miles of 00978 →

Questions about this ZIP code

Where is ZIP code 00978?

00978 is in St Just, Puerto Rico, in Trujillo Alto Municipio, part of the San Juan-Bayamón-Caguas, PR metropolitan area. Its published point location is 18.3786, -66.0500.

What county is 00978 in?

00978 lies in Trujillo Alto Municipio.

What area code is 00978?

St Just uses area codes 787 and 939, from NANPA's telephone records.

What time zone is 00978 in?

00978 uses America/Puerto_Rico.

What ZIP codes are near 00978?

The closest are 00927 (1.5 mi), 00925 (1.5 mi), 00926 (2.1 mi), 00923 (2.4 mi) and 00921 (2.6 mi).

Is 00978 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. “00978 ZIP Code — St Just, Puerto Rico (Trujillo Alto Municipio).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/00978

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/00978.json

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