Find the last 4 digits (ZIP+4) for an address in 20171

ZIP 20171, Herndon, VA is filled in. Just type the street address.

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ZIP Code 20171 – Herndon, VA

Herndon, Virginia · Fairfax County · Eastern time

ZIP code20171
CityHerndon
StateVirginia
CountyFairfax County
Population51,286
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area11.62 sq mi
Center (lat, long)38.9269, -77.3968

Area codes in this area

703571

These are the area codes that most often serve ZIP 20171 (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

20191 Reston · 2.5 mi20172 Herndon · 3 mi22095 Herndon · 3 mi20151 Chantilly · 3.3 mi22033 Fairfax · 3.6 mi20190 Reston · 3.7 mi20170 Herndon · 3.8 mi22124 Oakton · 4.2 mi

About ZIP 20171

ZIP code 20171 is assigned to Herndon, Virginia. It lies in Fairfax County. Its Census area covers about 11.62 square miles of land. The closest neighboring ZIP is 20191 (Reston), about 2.5 miles away.

Every address in 20171 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