New York · Eastern Time
Hempstead, NY Area Codes
Hempstead is served by 2 area codes (363, 516). Here's which is original, which are overlays, and how to pick one for a new local number.
Last updated October 1, 2026
Area codes serving Hempstead
Hempstead sits in New York, part of the Northeast region and the Eastern Time zone. Its numbers are spread across an overlay of 2 codes that all cover the same ground: 363, 516.
The original code is 516 (in service since 1951). As the area ran low on numbers, regulators added overlay codes on top instead of splitting the city, so longtime residents kept their numbers while new lines received a newer code.
| Code | Area served | In service |
|---|---|---|
| 363 | Nassau County on western Long Island | January 20, 2023 |
| 516 | Nassau County on western Long Island | January 1, 1951 |
Nearby cities sharing these area codes
- Levittown
- Hicksville
- Freeport
- Valley Stream
- Long Beach
- Glen Cove
- Garden City
- Rockville Centre
- Massapequa
- Baldwin
- Oceanside
- Uniondale
- East Meadow
How to pick an area code for a new number
When you activate a new line in Hempstead, the carrier assigns whichever code has numbers available — you usually can't choose. If a specific code matters to you (for example the prestige of 516), ask the carrier whether any blocks remain, or request a number transfer. All codes here dial identically and cost the same.
Dialing in Hempstead
Because Hempstead is an overlay area, 10-digit dialing is mandatory: always dial the area code plus the seven-digit number, even for a neighbor. See 10-digit dialing and overlay area codes for the background. For every code in New York, visit the New York area codes page.
Quick answers
Hempstead area code FAQ
What area codes does Hempstead use?
Hempstead, NY is served by 2 area codes: 363, 516.
Which is the original Hempstead area code?
516 is the original code for Hempstead, in service since 1951; the others were added later for more numbers.
Do I need to dial the area code in Hempstead?
Yes. With multiple overlapping codes, 10-digit dialing is required for every call in this area.