The 516 area code covers Nassau County, Farmingdale and 5 more places in New York.
Area code 516 is in New York, on Eastern Time. In the 516 area, phone numbers are given out most in Nassau County, then Suffolk County. It has been in service since 1951. 363 covers the same area, so two neighbours can have different area codes.
- Where
- Nassau County and Suffolk County, New York
- Time zone
- Eastern Time
- In service since
- 1951
- Shares its area with
- 363 (since 2023)
- Prefixes in use
- 783
- How to dial
- Local calls need all 10 digits: 516-555-0142.
Find out who called you from a 516 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 (516) number is on today, use our free carrier lookup.
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Nassau County holds 90% of the phone prefixes in area code 516.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 783 prefixes in use shows where 516 numbers are actually given out.
- Nassau County701 prefixes, 90%
- Farmingdale29 prefixes, 4%
- Selden25 prefixes, 3%
- Cold Spring Harbor10 prefixes, 1%
- Brentwood10 prefixes, 1%
- Central Islip5 prefixes, <1%
- Amityville3 prefixes, <1%
Of the carriers named here, T-Mobile holds the most phone number prefixes in area code 516: 95 of 783.
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 783 prefixes in use in 516 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| T-MobileMobile network | 95 | 12% |
| AT&T MobilityMobile network | 88 | 11% |
| Cablevision Lightpath | 39 | 5% |
| BandwidthSupplies numbers to VoIP and app-based phone services | 28 | 4% |
| SpokPaging network | 28 | 4% |
| Metro by T-MobileT-Mobile's prepaid brand | 22 | 3% |
| 30 other carriers | 483 | 62% |
62% 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.
516 has been split once and overlaid once since 1951.
1951
516 starts, split off from 914.
1999
On November 1, 1999, 631 splits off and takes part of the 516 area.
2023
On January 20, 2023, 363 is added on top of 516, so new numbers here can get either code.
A 516 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 516 are 212, 914 and 201.
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 516.
Where is area code 516?
516 covers Nassau County, Farmingdale, Selden and Cold Spring Harbor and 3 more places in New York. In the 516 area, phone numbers are given out most in Nassau County, then Suffolk County.
What state is area code 516 in?
New York. 516 is a New York area code on Eastern Time.
What cities use area code 516?
The places holding the most 516 prefixes are Nassau County, Farmingdale, Selden, Cold Spring Harbor, Brentwood, Central Islip and Amityville. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 516?
No single phone company owns 516. NANPA's records list its 783 prefixes across many carriers, and the ones named on this page include T-Mobile, AT&T Mobility and Cablevision Lightpath. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 516 in?
516 is on Eastern Time.
When did area code 516 start?
516 went into service in 1951, when it was split off from 914.
Is 516 the same area as 363?
Yes. 363 (since 2023) covers the same ground as 516. 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 516 number?
Local calls need all 10 digits: 516-555-0142.
Is 516 a toll-free number?
No. 516 is a regular area code for Nassau County 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 516?
The closest are 212/718/917/646/347/929/332/465 (New York City, New York), 914 (Westchester County, New York), 201/551 (Hackensack, New Jersey) and 631/934 (Brentwood, New York), measured between the centres of each area.
Who called me from a 516 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 516 a scam?
516 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.