Find the last 4 digits (ZIP+4) for an address in 21704

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ZIP Code 21704 – Frederick, MD

Frederick, Maryland · Frederick County · Eastern time

ZIP code21704
CityFrederick
StateMaryland
CountyFrederick County
Population20,006
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area26.63 sq mi
Center (lat, long)39.3549, -77.3759

Area codes in this area

227240301

These are the area codes that most often serve ZIP 21704 (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

21717 Buckeystown · 3.2 mi21754 Ijamsville · 3.6 mi21705 Frederick · 4.1 mi21710 Adamstown · 4.4 mi21703 Frederick · 5.3 mi21770 Monrovia · 6.4 mi21701 Frederick · 6.5 mi21774 New Market · 6.6 mi

About ZIP 21704

ZIP code 21704 is assigned to Frederick, Maryland. It lies in Frederick County. Its Census area covers about 26.63 square miles of land. The closest neighboring ZIP is 21717 (Buckeystown), about 3.2 miles away.

Every address in 21704 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