Find the last 4 digits (ZIP+4) for an address in 21703

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ZIP Code 21703 – Frederick, MD

Frederick, Maryland · Frederick County · Eastern time

ZIP code21703
CityFrederick
StateMaryland
CountyFrederick County
Population41,960
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area32.03 sq mi
Center (lat, long)39.3670, -77.4735

Area codes in this area

227240301

These are the area codes that most often serve ZIP 21703 (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 mi21714 Braddock Heights · 3.6 mi21705 Frederick · 4.4 mi21710 Adamstown · 4.6 mi21755 Jefferson · 5.1 mi21704 Frederick · 5.3 mi21777 Point Of Rocks · 6.7 mi21769 Middletown · 7.3 mi

About ZIP 21703

ZIP code 21703 is assigned to Frederick, Maryland. It lies in Frederick County. Its Census area covers about 32.03 square miles of land. The closest neighboring ZIP is 21717 (Buckeystown), about 3 miles away.

Every address in 21703 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