Find the last 4 digits (ZIP+4) for an address in 20899

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ZIP Code 20899 – Gaithersburg, MD

Gaithersburg, Maryland · Montgomery County · Eastern time

ZIP code20899
CityGaithersburg
StateMaryland
CountyMontgomery County
Population57
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area0.11 sq mi
Center (lat, long)39.1444, -77.2162

Area codes in this area

227240301

These are the area codes that most often serve ZIP 20899 (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

20813 Bethesda · 0.5 mi20827 Bethesda · 0.5 mi20848 Rockville · 0.5 mi20859 Potomac · 0.5 mi20875 Germantown · 0.5 mi20884 Gaithersburg · 0.5 mi20897 Suburb Maryland Fac · 0.5 mi20898 Gaithersburg · 0.5 mi

About ZIP 20899

ZIP code 20899 is assigned to Gaithersburg, Maryland. It lies in Montgomery County. Its Census area covers about 0.11 square miles of land. The closest neighboring ZIP is 20813 (Bethesda), about 0.5 miles away.

Every address in 20899 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