The 934 area code is an overlay serving Suffolk County on eastern Long Island, New York, sharing the same territory as the established 631 code. Placed in service in 2016, 934 reaches communities from Huntington and Islip to the Hamptons and the North Fork. If a 934 number has appeared on your caller ID, this guide explains where it comes from, how to dial it, and how to stay safe from spoofed calls.
Quick Summary: Area Code 934 at a Glance
| Detail | Information |
|---|---|
| Area Code | 934 |
| State | New York (NY) |
| Major Cities | Brookhaven, Islip, Huntington, Riverhead (Suffolk County) |
| Time Zone | Eastern Time (ET) |
| Country Code | +1 (USA) |
| Overlay Codes | 631 (shared territory) |
Geographic Coverage & Major Cities
Area code 934 is an overlay — it occupies the exact same footprint as 631 rather than a separate area. Together they serve Suffolk County, the eastern portion of Long Island stretching from the Nassau County line all the way to Montauk Point.
Towns and communities served by the 934 area code include:
- Brookhaven and Islip — Suffolk’s largest towns, spanning much of the central island
- Huntington and Babylon — western Suffolk’s busy commuter suburbs
- Riverhead and the North Fork — the gateway to Long Island wine country
- The Hamptons and Montauk — the South Fork’s renowned beach resort towns
Because it shares Suffolk County with 631, a 934 number carries the same eastern Long Island identity — it simply reflects a more recently issued line.
A Brief History of Area Code 934
Area code 934 entered service in 2016 as an overlay for the 631 region. As Suffolk County ran low on available 631 numbers, regulators added 934 across the same territory rather than splitting the county, so existing customers kept their numbers. New lines in Suffolk County may now be assigned either 631 or 934, and the area uses mandatory 10-digit dialing.
Time Zone & Best Time to Call
Numbers in the 934 area code operate on Eastern Time (ET). The region observes Daylight Saving Time, switching from EST (UTC−5) to EDT (UTC−4) between March and November.
How to Dial Phone Numbers in Area Code 934
Because 934 overlays 631, Suffolk County requires 10-digit dialing for every call.
Calling within the United States or Canada
- 10-digit dialing: Always include the area code — 934-XXX-XXXX.
- 11-digit dialing: You can also dial 1-934-XXX-XXXX; the leading 1 is the NANP country code.
Calling from outside the United States
- Format: [exit code] + 1 + 934 + XXX + XXXX
- From the UK, Europe, or most of Asia/Africa: 00 1 934 XXX XXXX
- From any mobile phone worldwide: +1 934 XXX XXXX
Is Area Code 934 a Scam? Safety & Protection Tips
Area code 934 is a legitimate New York area code — a call from it is not fraudulent by default. Because 934 is newer and less familiar than 631, some people are wary of it, and scammers may spoof the code to disguise their real number as a local Long Island line. Neighbor spoofing, which mimics your own number’s first six digits, is especially common in high-population suburbs like Suffolk County.
Common scam tactics linked to this region
| Scam type | What to watch for |
|---|---|
| Bank & card impersonation | Alerts about “suspicious activity” seeking your account details |
| Government impersonation | Callers posing as the IRS or SSA threatening legal action |
| Home-services scams | Fake calls about “required” repairs, warranties, or inspections |
| Debt-collection fraud | Pressure to pay a debt you do not recognize |
How to report, block, and look up 934 callers
- Never share personal or banking details with an unexpected caller.
- Block the number using your phone’s built-in feature or a reputable call-screening app.
- Look up the number with a trusted reverse phone lookup before calling back.
- Report it to the FTC at reportfraud.ftc.gov and register at DoNotCall.gov.
Nearby & Related Area Codes in New York
Area code 934 shares and borders several other downstate New York codes:
- 631 — the original Suffolk County code that 934 overlays (see our 631 area code guide)
- 516 & 363 — Nassau County, the rest of Long Island to the west (see our 516 area code and 363 area code)
- 718, 347 & 929 — Queens and the other NYC outer boroughs (see the 718 area code)
- 212, 646 & 917 — New York City proper
Explore more codes across the state on our New York area codes hub, or browse every prefix in our US area codes directory.
↑ See the complete list of All US Area Codes by State – every area code across all 50 states in one directory.
Explore Neighboring States
Researching area codes just across the state line? Start with these codes in the states that border New York:
- New Jersey – area code 201
- Pennsylvania – area code 215
- Connecticut – area code 203
- Massachusetts – area code 617
- Vermont – area code 802
Frequently Asked Questions About Area Code 934
Where is the 934 area code located?
Area code 934 covers Suffolk County on eastern Long Island, New York — the same area as 631 — including Brookhaven, Islip, Huntington, Riverhead, and the Hamptons. It operates on Eastern Time.
Is 934 a real area code?
Yes. In service since 2016, 934 is a legitimate New York area code introduced as an overlay for the 631 region.
Is 934 a landline or cell phone area code?
Both. As a newer overlay, 934 is assigned to landlines, mobile phones, and VoIP numbers across Suffolk County.
Should I answer a call from an unknown 934 number?
If you are not expecting the call, let it go to voicemail. Legitimate callers leave a message, while spoofed or robocall numbers usually will not. Verify any unfamiliar number with a reverse lookup before calling back.
Related 934 Guides
- Is a 934 call safe? Read Is area code 934 a scam? Spam & safety guide.
- Worried about spam or robocalls? Browse our Scam Alerts directory.