Find the last 4 digits (ZIP+4) for an address in 21664

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ZIP Code 21664 – Secretary, MD

Secretary, Maryland · Dorchester County · Eastern time

ZIP code21664
CitySecretary
StateMaryland
CountyDorchester County
Population635
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area0.29 sq mi
Center (lat, long)38.6076, -75.9471

Area codes in this area

410443667

These are the area codes that most often serve ZIP 21664 (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

21631 East New Market · 1.8 mi21643 Hurlock · 4.9 mi21835 Linkwood · 5.1 mi21673 Trappe · 5.7 mi21659 Rhodesdale · 8.2 mi21609 Bethlehem · 9.2 mi21655 Preston · 9.7 mi21613 Cambridge · 10.1 mi

About ZIP 21664

ZIP code 21664 is assigned to Secretary, Maryland. It lies in Dorchester County. Its Census area covers about 0.29 square miles of land. The closest neighboring ZIP is 21631 (East New Market), about 1.8 miles away.

Every address in 21664 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