Huntington, Babylon, Islip, Brookhaven, and the East End's Hamptons and wine country share the 934 area code, an overlay covering all of Suffolk County on Long Island. New numbers began carrying 934 on July 16, 2016, layered onto the existing 631 code — the first overlay New York State ever added outside New York City.
This guide covers 934's counties and cities, where its boundaries stop, what's driving demand across a region that mixes dense suburbs with East End tourism, whether 934 calls ever get flagged as spam, and how to get a number of your own.
Counties and cities at a glance
934/631 covers all of Suffolk County, from the western commuter towns near the New York City line out to the East End's Hamptons and North Fork wine country — Huntington, Babylon, Islip, Brookhaven, Smithtown, Riverhead, Southampton, and East Hampton.
What 934 does NOT cover:
- Nassau County, just to the west → 516
- New York City's boroughs → 212 / 718 / 347 / 929
- Both 934 and 631 cover identical Suffolk County territory — the choice between them comes down to which prefixes are still available
What's driving demand across Suffolk County
Suffolk County blends dense suburban business with a research and tourism economy on its eastern end:
Hamptons and North Fork tourism Seasonal visitors and second-home owners keep hospitality, real estate, and service businesses adding lines every year.
Brookhaven National Laboratory This major federal research facility anchors a steady base of scientific and technical lines.
Cold Spring Harbor Laboratory A leading biomedical research institution drives demand for research and administrative phone lines.
Many of these Suffolk County businesses are moving their phone systems onto UCaaS (Unified Communications as a Service) — one cloud platform for calling, video, and messaging that scales as a company adds locations across the island, the same pattern behind newer overlays like 928 in northern Arizona. Contact us to set up a 934 or 631 number for your Long Island business.
Is 934 ever flagged as a spam area code?
Because Suffolk County's Hamptons market attracts high-value real estate and seasonal rental activity, the region sees its share of rental-scam and wire-fraud attempts tied to real estate deals — not unique to 934 specifically, but worth extra caution during summer rental season. Most 934 and 631 calls are ordinary local business or personal calls; verify before wiring money or sharing payment details tied to any unfamiliar call.
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How to get a 934 area code number
Ten-digit dialing has been mandatory in Suffolk County since June 18, 2016. Sign up with a VoIP provider such as My Country Mobile, search available numbers in either 934 or 631, and pick a prefix tied to the part of Suffolk County your business serves.
Most providers can port an existing number over from another carrier, activate a new line same-day, and route calls to any device without new hardware.
Time zone & how to dial a 934 number
Suffolk County runs on Eastern Time (ET) — EST (UTC −5) in winter, EDT (UTC −4) during Daylight Saving Time. Dial 1, then the area code, then the seven-digit number, for every local call.
Key takeaways
- 934 is an overlay of 631, covering all of Suffolk County on Long Island.
- It launched on July 16, 2016 — the first overlay New York State added outside New York City.
- Anchors include Hamptons tourism, Brookhaven National Laboratory, and Cold Spring Harbor Laboratory.
- Both 934 and 631 cover identical territory at identical rates.
- Time zone: Eastern (ET), with mandatory 10-digit dialing since June 2016.
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Frequently asked questions
What is the 934 area code?
It's an overlay covering all of Suffolk County, Long Island, including Huntington, Islip, and the Hamptons, sharing the same footprint as 631.
Where is the 934 area code located?
Suffolk County, New York — the eastern two-thirds of Long Island, from Huntington to Montauk.
Is 934 a Florida area code?
No. It has never been assigned to Florida — this is strictly a New York code.
What state is the 934 area code in?
New York — specifically Suffolk County on Long Island.
What time zone is the 934 area code?
Eastern Time Zone (ET) — EST (UTC −5) in winter and EDT (UTC −4) during Daylight Saving Time.
Why does Suffolk County have two area codes, 934 and 631?
934 was added in 2016 as an overlay after regulators determined 631 would run short on numbers due to Suffolk County's continued growth.
How do I get a 934 area code number?
Sign up with a VoIP provider such as My Country Mobile, search for available numbers in either code, choose a Suffolk County prefix, select a plan, and activate.
