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/98231

98231

ZIP 98231 is in Blaine, Washington, in Whatcom County; area codes 360 and 564; Pacific time. Blaine has 2 ZIP codes; the other is 98230.

Type
No street area
Time zone
America/Los_Angeles
County
Whatcom
Metro area
Bellingham, WA
Coordinates
48.9937, -122.7471

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 98230, whose figures describe that area — not this ZIP code.

☼ Live from 98231 — Blaine, WA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 98231 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 98231
  • 🔢 Type 98231 into a pocket calculator and turn it upside down: IEZBG — not quite a word, sorry.
  • ➕ As a number, 98,231 = 7 × 14033. Its digits add up to 23, a total 2,533 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111111110110111
  • 🏠 Its numerical neighbours: 98230 (Blaine, WA, 3 mi away) and 98232 (Bow, WA, 33 mi away).
  • 🔄 Backwards, 98231 becomes 13289, which is not a ZIP code at all.
  • 👥 35 other ZIP codes are made of exactly the same digits (12839, 12983, 18239, 18923, 18932, 19382, …). The farthest-flung twin is 32891 in Orlando, FL, 2,596 miles away.
  • 🧭 Farther north than 98% of all ZIP codes, and farther west than 97%.
  • 🎯1,342 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 98231 and you would come out at 48.99°S, 57.25°E — 586 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 16h 12m of daylight. Shortest: 8h 13m.
🌙 The sky over 98231 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments8This ZIP8
Employees55This ZIP55
Annual payroll$2,512,000This ZIP$2,512,000

Land area

ZIP codes near 98231

ZIPCityDistance
98230 Blaine, WA 3.4 mi
98240 Custer, WA 6.5 mi
98248 Ferndale, WA 10.5 mi
98264 Lynden, WA 13.6 mi
98281 Point Roberts, WA 14.2 mi
98225 Bellingham, WA 19.6 mi
98226 Bellingham, WA 19.7 mi
98276 Nooksack, WA 19.9 mi
98227 Bellingham, WA 20.0 mi
98228 Bellingham, WA 20.0 mi

Find every ZIP code within 10 miles of 98231 →

Questions about this ZIP code

Where is ZIP code 98231?

98231 is in Blaine, Washington, in Whatcom County, part of the Bellingham, WA metropolitan area. Its published point location is 48.9937, -122.7471.

What county is 98231 in?

98231 lies in Whatcom County.

What area code is 98231?

Blaine uses area codes 360 and 564, from NANPA's telephone records.

What time zone is 98231 in?

98231 uses America/Los_Angeles.

What ZIP codes are near 98231?

The closest are 98230 (3.4 mi), 98240 (6.5 mi), 98248 (10.5 mi), 98264 (13.6 mi) and 98281 (14.2 mi).

Is 98231 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. “98231 ZIP Code — Blaine, Washington (Whatcom County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/98231

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/98231.json

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