Find the last 4 digits (ZIP+4) for an address in 21010

ZIP 21010, Gunpowder, MD is filled in. Just type the street address.

Addresses are checked through our secure proxy. Bot checks use Cloudflare Turnstile. Each device can run 5 live checks per day; repeats of the same address are free.

ZIP Code 21010 – Gunpowder, MD

Gunpowder, Maryland · Harford County · Eastern time

ZIP code21010
CityGunpowder
StateMaryland
CountyHarford County
Population239
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area7.25 sq mi
Center (lat, long)39.3909, -76.2926

Area codes in this area

410443667

These are the area codes that most often serve ZIP 21010 (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

21040 Edgewood · 2.7 mi21027 Chase · 4.6 mi21085 Joppa · 5.1 mi21009 Abingdon · 5.6 mi21162 White Marsh · 6 mi21220 Middle River · 6.2 mi21156 Upper Falls · 6.5 mi21017 Belcamp · 6.6 mi

About ZIP 21010

ZIP code 21010 is assigned to Gunpowder, Maryland. It lies in Harford County. Its Census area covers about 7.25 square miles of land. The closest neighboring ZIP is 21040 (Edgewood), about 2.7 miles away.

Every address in 21010 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