The 934 area code covers the same area as 631, including Brentwood, Farmingdale and 49 more places in New York.
Area code 934 is in New York, on Eastern Time. In the 934 area, phone numbers are given out most in Suffolk County, then Nassau County. It has been in service since July 16, 2016. 631 covers the same area, so two neighbours can have different area codes.
- Where
- Suffolk County and Nassau County, New York
- Time zone
- Eastern Time
- In service since
- July 16, 2016
- Shares its area with
- 631 (since 1999)
- Prefixes in use
- 131
- How to dial
- Local calls need all 10 digits: 934-555-0142.
Find out who called you from a 934 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (934) number is on today, use our free carrier lookup.
Works for US & Canada numbers. Enter a 10-digit number, e.g. (415) 555-0132.
Free & rate-limited. No signup required to try.
Riverhead holds 12% of the phone prefixes in area code 934.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 131 prefixes in use shows where 934 numbers are actually given out.
- Riverhead16 prefixes, 12%
- Amityville12 prefixes, 9%
- Brentwood8 prefixes, 6%
- Patchogue6 prefixes, 5%
- Babylon6 prefixes, 5%
- Yaphank5 prefixes, 4%
- Huntington4 prefixes, 3%
- Bellport4 prefixes, 3%
Also served: Patchogue, Ronkonkoma, Selden and Smithtown and 39 smaller places.
Of the carriers named here, Fractel holds the most phone number prefixes in area code 934: 23 of 131.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 131 prefixes in use in 934 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| Fractel | 23 | 18% |
| T-MobileMobile network | 21 | 16% |
| AT&T MobilityMobile network | 12 | 9% |
| Cablevision Lightpath | 7 | 5% |
| Evolve Cellular | 7 | 5% |
| Ton80 Communications | 5 | 4% |
| 16 other carriers | 56 | 43% |
99% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
934 started in 2016 as an overlay on 631, and its ground has not changed since.
2016
934 starts on July 16, 2016, as an overlay on 631: new numbers on the same ground.
A 934 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 934 are 203, 516 and 860.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
New York has 22 other area codes.
These are the questions people ask most about area code 934.
Where is area code 934?
934 covers Brentwood, Farmingdale, Riverhead and Huntington and 47 more places in New York. In the 934 area, phone numbers are given out most in Suffolk County, then Nassau County.
What state is area code 934 in?
New York. 934 is a New York area code on Eastern Time.
What cities use area code 934?
The places holding the most 934 prefixes are Brentwood, Farmingdale, Riverhead, Huntington, Central Islip, Amityville, Babylon and Deer Park, out of 51 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 934?
No single phone company owns 934. NANPA's records list its 131 prefixes across many carriers, and the ones named on this page include Fractel, T-Mobile and AT&T Mobility. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 934 in?
934 is on Eastern Time.
When did area code 934 start?
934 went into service on July 16, 2016, as an overlay on 631: new numbers for the same area.
Is 934 the same area as 631?
Yes. 631 (since 1999) covers the same ground as 934. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 934 number?
Local calls need all 10 digits: 934-555-0142.
Is 934 a toll-free number?
No. 934 is a regular area code for Brentwood and Farmingdale in New York, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 934?
The closest are 203/475 (New Haven, Connecticut), 516/363 (Nassau County, New York), 860/959 (Hartford, Connecticut) and 914 (Westchester County, New York), measured between the centres of each area.
Who called me from a 934 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 934 a scam?
934 is a real New York area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.