Find the last 4 digits (ZIP+4) for an address in 11742

ZIP 11742, Holtsville, NY is filled in. Just type the street address.

Addresses are checked through our secure proxy. Bot checks use Cloudflare Turnstile. Each device can run 5 live checks per day; repeats of the same address are free.

ZIP Code 11742 – Holtsville, NY

Holtsville, New York · Suffolk County · Eastern time

ZIP code11742
CityHoltsville
StateNew York
CountySuffolk County
Population13,202
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area5.15 sq mi
Center (lat, long)40.8104, -73.0419

Area codes in this area

631934

These are the area codes that most often serve ZIP 11742 (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

00501 Holtsville · 0.4 mi00544 Holtsville · 0.4 mi11741 Holbrook · 1.8 mi11738 Farmingville · 1.9 mi11763 Medford · 3.3 mi11779 Ronkonkoma · 3.8 mi11784 Selden · 4 mi11715 Blue Point · 4.1 mi

About ZIP 11742

ZIP code 11742 is assigned to Holtsville, New York. It lies in Suffolk County. Its Census area covers about 5.15 square miles of land. The closest neighboring ZIP is 00501 (Holtsville), about 0.4 miles away.

Every address in 11742 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