The 363 area code covers the same area as 516, including Nassau, Farmingdale and 5 more places in New York.
363 has been in service since 2023, on Eastern Time. 516 covers the same area, so two neighbours can have different area codes.
- Where
- Rensselaer County, Suffolk County and Nassau County, New York
- Time zone
- Eastern Time
- In service since
- 2023
- Shares its area with
- 516 (since 1951)
- Prefixes in use
- 38
- How to dial
- Local calls need all 10 digits: 363-555-0142.
Find out who called you from a 363 number.
Enter the full 10-digit number to see who it is listed to, where it is registered, and whether it is a mobile, landline or VoIP line.
Nassau holds 95% of the phone prefixes in area code 363.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 38 prefixes in use shows where 363 numbers are actually given out.
- Nassau36 prefixes, 95%
- Cold Spring Harbor1 prefix, 3%
- Farmingdale1 prefix, 3%
363 started in 2023 as an overlay on 516, and its ground has not changed since.
2023
363 starts as an overlay on 516: new numbers on the same ground.
A 363 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.
New York has 22 other area codes.
These are the questions people ask most about area code 363.
Where is area code 363?
363 covers Nassau, Farmingdale, Selden and Cold Spring Harbor and 3 more places in New York, in Rensselaer County, Suffolk County and Nassau County.
What time zone is area code 363 in?
363 is on Eastern Time.
Is 363 the same area as 516?
Yes. 516 (since 1951) covers the same ground as 363. 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 363 number?
Local calls need all 10 digits: 363-555-0142.
Who called me from a 363 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 363 a scam?
363 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.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.