363 area code
Nassau area, Eastern Time.Area code 363 covers Nassau, Farmingdale and Cold Spring Harbor in New York, on Eastern Time. 516 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 363 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 363 has 3. Each one's share is how many 363 numbers start there. Its biggest metro area is New York-Newark-Jersey City, NY-NJ.
- Nassau94%
- Farmingdale3%
- Cold Spring Harbor3%
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 363 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 363 number to them, since you can't tell a work line from a personal cell.
What applies to 363Every 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
363 and 516
363 went into service on January 20, 2023. 363 and 516 cover the same area, so new numbers can get either code and neighbors can have different area codes. 363 holds 5% of the area's exchanges; 516 holds the most. Local calls take all 10 digits.
- 1951516 overlay
- 2023363 starts
Source: NANPA area code database
Calling a list of 363 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.
363 area code FAQ
What area code is 363?
363 is a New York area code for Nassau, Farmingdale and Cold Spring Harbor.
What time zone is the 363 area code in?
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer).
Is 516 the same as 363?
Same area, different code. 363 and 516 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 363 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 363 area code start?
On January 20, 2023.
Calling 363 numbers? Reach more of them.
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