Find the last 4 digits (ZIP+4) for an address in 98240

ZIP 98240, Custer, WA is filled in. Just type the street address.

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ZIP Code 98240 – Custer, WA

Custer, Washington · Whatcom County · Pacific time

ZIP code98240
CityCuster
StateWashington
CountyWhatcom County
Population3,593
Time zonePacific · local time
ZIP typeStandard (has a Census ZCTA area)
Land area22.26 sq mi
Center (lat, long)48.9482, -122.6207

Area codes in this area

360564

These are the area codes that most often serve ZIP 98240 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

98230 Blaine · 3.8 mi98248 Ferndale · 5.7 mi98231 Blaine · 6.5 mi98264 Lynden · 7.5 mi98226 Bellingham · 13.5 mi98276 Nooksack · 13.7 mi98225 Bellingham · 14.1 mi98227 Bellingham · 14.3 mi

About ZIP 98240

ZIP code 98240 is assigned to Custer, Washington. It lies in Whatcom County. Its Census area covers about 22.26 square miles of land. The closest neighboring ZIP is 98230 (Blaine), about 3.8 miles away.

Every address in 98240 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources