Introduction
The 516 area code is the telephone code for Nassau County, New York — the suburban western half of Long Island, immediately east of Queens, on Eastern Time. The prefix has served the region since the early postwar boom, when new suburbs were spreading across former potato fields and the island's aircraft plants were among the busiest in the world. Today it connects village downtowns, beach communities, hospital campuses, and commuter neighborhoods a short train ride from Manhattan.
This guide covers what the 516 area code includes, the communities inside it, how the new 363 overlay works, where the Suffolk County and New York City codes take over, what drives Nassau's economy, and the steps any business can follow to activate a 516 number without a Long Island office.
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Learn moreWhat Is the 516 Area Code?
516 is the North American Numbering Plan code assigned to Nassau County, New York — the suburban county immediately east of Queens on Long Island. It was created in 1951, carved from the 914 territory as the postwar population surge transformed the island, and for decades it covered both Nassau and Suffolk before Suffolk received its own code. Nassau's continuing demand for numbers has since brought the 363 overlay, and ten-digit dialing applies to every local call.
- Dialing format: (516) 555-0123
- International format: +1 516-555-0123
- Time zone: Eastern Time (ET) — UTC−5 Standard, UTC−4 Daylight Saving
- Year introduced: 1951
Where Is the 516 Area Code? Cities & Communities
The code covers Nassau County from the Gold Coast mansions of the North Shore to the barrier beaches on the Atlantic — a mosaic of villages, hamlets, and small cities rather than one dominant downtown. Hempstead, Garden City, Long Beach, and Great Neck each show a different face of the county.
Hempstead
The Town of Hempstead is the county's population hub and one of the largest townships in the country, taking in dozens of villages and hamlets across southern Nassau. Hempstead village itself hosts a university, county offices, and one of the busiest transit hubs on Long Island.
Garden City
Garden City sits at the center of the county — a planned village of broad streets, a landmark hotel, and a busy shopping corridor along Franklin Avenue. Law firms, financial offices, and regional headquarters favor its address, making it one of Nassau's premier business locations.
Long Beach
Long Beach is the City by the Sea — a barrier-island community with a famous oceanfront boardwalk, a year-round surf scene, and a walkable downtown connected to Manhattan by direct train. It gives the code its beach-town identity within an otherwise suburban county.
Great Neck
Great Neck anchors the North Shore peninsula that inspired the fictional West Egg of American literature. Its villages combine harborside neighborhoods, a thriving commercial district, and a strong professional community, with quick rail access to Midtown.
Communities the 516 Code Serves
The code maps to Nassau County alone — Suffolk County to the east uses 631. Anyone checking whether a local number will land in the right market can use the list below as a quick reference for the communities the code covers.
- Central Nassau — Hempstead, Garden City, Mineola (the county seat), and Hicksville
- South Shore — Freeport, Long Beach, Valley Stream, and Massapequa
- North Shore — Great Neck, Glen Cove, and Oyster Bay
- Shared 363 overlay territory — every community above can also receive a 363 number on the identical footprint
516 Overlay and Nearby Area Codes
After seven decades of suburban growth, Nassau County's supply of new 516 prefixes finally thinned, and regulators introduced 363 as an overlay across the identical territory. Existing numbers stayed as they were, newer lines may carry 363, and every local call is dialed with the full ten digits.
The borders are woven into daily life. Eastward, Suffolk County uses 631 and its 934 overlay, covering the island from Babylon to the Hamptons and Montauk. Westward, the city line brings Queens and Brooklyn under the 718 area code and its companions — so a Long Island commuter can cross three numbering territories before reaching Manhattan.
- 363 — the overlay sharing the exact same Nassau County footprint as 516
- 631 / 934 — Suffolk County, from the Nassau border to Montauk
- 718 — Queens and Brooklyn, immediately west of the county line
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516 Time Zone
The code observes Eastern Time (ET) — UTC−5 during Standard Time and UTC−4 during Daylight Saving Time, which runs from mid-March to early November. Nassau County keeps the same clock as New York City and the entire eastern seaboard.
That alignment is a quiet business asset: a Nassau number answers on the same schedule as Manhattan clients, East Coast suppliers, and the country's financial markets, with no conversion needed for the region's dense commuter economy.
The Nassau County Economy and Business Scene
Nassau County pairs suburban scale with serious economic weight — major hospital systems, dense professional services, and an aviation legacy that helped put astronauts on the moon. Its local prefix anchors business identity on the island's western half much as the 914 area code does for Westchester across the Sound, telling customers a firm is genuinely of the place.
Healthcare
Healthcare is one of the region's largest employers, with sprawling hospital campuses, specialty centers, and physician networks spread across the county. Medical education and research facilities add depth, making health services the backbone of Nassau's modern job market.
Professional Services
Law, accounting, and finance firms cluster in Garden City, Uniondale, and Great Neck, serving both Long Island businesses and clients across the New York metro. The county's courts, corporate parks, and commuter talent pool sustain one of the strongest professional-services markets outside the five boroughs.
Aerospace Heritage
Long Island built aircraft for both world wars and the lunar module that landed on the moon, much of that work rooted in Nassau's plants. While the great factories have given way to offices and housing, the engineering culture endures in aerospace suppliers, defense electronics firms, and the museums that celebrate the Cradle of Aviation.
Many regional operators also compare notes with peers in the 973 area code, where Newark businesses face similar routing choices.
How to Get a 516 Phone Number
A Nassau County number is available to any business through a cloud phone provider — no Long Island office, hardware, or contract required. Three steps and a few minutes cover it.
- 1Choose a provider — register with a cloud phone service such as MeraTalk that offers Long Island numbers.
- 2Pick a number — browse available 516 combinations and reserve one that customers will remember.
- 3Activate and route — complete verification and direct the number wherever needed; calls ring on any device, from a storefront phone in Garden City to a mobile app overseas.
The line then behaves like any local number: callers dial (516) 555-0123 within the US or +1 516-555-0123 from abroad, and auto-attendant, call recording, and CRM integration can be switched on from day one.
Dialing a 516 Number from Abroad
Connecting to a Nassau County line from overseas uses the same pattern as any United States number: the caller dials their country's international exit code, then 1 for North America, then the full ten-digit number. On mobile phones, typing a plus sign in place of the exit code works from virtually any country.
- From the UK or most of Europe: 00 1 516 XXX XXXX
- From Australia: 0011 1 516 XXX XXXX
- From any mobile handset: +1 516 XXX XXXX
Long Island businesses with international suppliers, overseas clients, or family-run import trades should publish their number in full international format — with the leading +1 — on websites and email signatures. It removes ambiguity for foreign callers and ensures contact details work the same whether the caller is in London, Sydney, or down the block in Hempstead. For more, see North American Numbering Plan.
Porting a Number Into or Out of the 516 Region
Federal portability rules mean a Nassau County number belongs to its subscriber, not to any particular carrier. A dental practice in Garden City or a contractor in Levittown can move a long-held line from a legacy landline carrier to a modern cloud service and keep the exact number customers have dialed for decades. The new provider manages the transfer once the owner supplies account details and a recent bill.
- 1Ask the new provider to confirm it can receive New York numbers, then complete its porting request form.
- 2Provide the current account number, billing address, and any transfer PIN the existing carrier requires.
- 3Leave the old account open until the port finishes — closing it first can forfeit the number.
Single-line ports usually finish within a few business days, and service continues uninterrupted while the transfer completes.
Conclusion
For three-quarters of a century the 516 prefix has followed Nassau County's story — from potato fields to postwar suburbs, from aircraft plants to hospital networks, from village greens to the Long Beach boardwalk. It remains the clearest signal that a phone number belongs to Long Island's western half.
Any business can carry that signal in minutes. A virtual 516 number activates online, rings on any device anywhere, and greets Nassau customers with a prefix they have trusted for generations.
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