516 area code
Nassau area, Eastern Time.Area code 516 covers Nassau, Farmingdale and Cold Spring Harbor in New York, on Eastern Time. 363 covers the same area.
Right now in Farmingdale
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer)
Calling hours: Every day, 8 AM to 9 PM (the federal rule)
Small talk
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Where 516 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 516 has 3. Each one's share is how many 516 numbers start there. Its biggest metro area is New York-Newark-Jersey City, NY-NJ.
- Nassau95%
- Farmingdale4%
- Cold Spring Harbor1%
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 516 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 516 number to them, since you can't tell a work line from a personal cell.
What applies to 516Every day, 8 AM to 9 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
516 and 363
516 went into service on January 1, 1951, split off from 914, and 631 was later split off from it. 516 and 363 cover the same area, so new numbers can get either code and neighbors can have different area codes. 516 holds 95% of the area's exchanges; 363 holds the rest. Local calls take all 10 digits.
- 1951516 starts
- 1999631 split off
- 2023363 overlay
Source: NANPA area code database
Calling a list of 516 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
516 area code FAQ
What area code is 516?
516 is a New York area code for Nassau, Farmingdale and Cold Spring Harbor.
What time zone is the 516 area code in?
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer).
Is 363 the same as 516?
Same area, different code. 516 and 363 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 516 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 516 area code start?
On January 1, 1951. It was split from 914.
Calling 516 numbers? Reach more of them.
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