New Jersey has 10 active area codes as of 2026, covering the state through a mix of original 1947 assignments, geographic splits, and modern overlays. This guide walks through the full list, which regions each code serves, the order they came online, and where new codes are most likely to land next.
The Short Answer
New Jersey currently has 10 active area codes in service. The count reflects a combination of population growth, the rise of mobile lines, and the way modern numbering allocates blocks — every line activated, whether a cellphone, a business desk line, a VoIP number, or a connected device, consumes a slot in the pool.
By population, New Jersey ranks #11 nationally with roughly 9,500,851 residents as of the most recent estimates. That puts the state’s area code count in line with its population peers — denser, faster-growing states need more codes; smaller states need fewer.
The Full List of New Jersey Area Codes
The active area codes serving New Jersey are listed below, in numerical order. Where a code is an overlay or a split-off from an earlier code, that relationship is noted.
- 201 — Northeastern New Jersey (Jersey City, Hackensack, Bergen and Hudson counties)
- 551 — Northeastern New Jersey (Bergen and Hudson counties) (overlay of 201)
- 609 — Central and southern New Jersey (Trenton, Princeton, Atlantic City)
- 640 — Central and southern New Jersey (Trenton, Princeton, Atlantic City) (overlay of 609)
- 732 — Central-eastern New Jersey (Edison, Toms River, New Brunswick, the northern Jersey Shore)
- 848 — Central-eastern New Jersey (Middlesex, Monmouth, Ocean counties) (overlay of 732)
- 856 — Southwestern New Jersey (Camden, Cherry Hill, Vineland)
- 862 — Northern New Jersey (Newark, Paterson, Clifton, Morristown) (overlay of 973)
- 908 — North-central New Jersey (Elizabeth, Plainfield, Union and Somerset counties)
- 973 — Northern New Jersey (Essex, Passaic, Morris, Sussex counties)
How New Jersey’s Area Codes Grew Over Time
New Jersey received its first area code, 201, when the North American Numbering Plan launched in 1947. That single code initially covered the entire state, and subsequent splits and overlays narrowed it over the decades that followed.
Ready to Get a New Jersey Number?
One-time fee. No monthly charges. Port to any carrier in 3–5 business days. NYC's most trusted source since 2009.
Browse New Jersey Area Codes →- 1947 — 201 assigned as New Jersey's sole area code at the launch of the North American Numbering Plan, covering the entire state. It was the first area code ever assigned in the NANP.
- 1956 — 609 split off from 201 for the southern half of the state, including Trenton, the Philadelphia suburbs, and the southern Jersey Shore.
- 1991 — 908 split off from 201 for north-central New Jersey, including Elizabeth, Union County, and the western counties.
- 1997 — 732 split off from 908 on June 1 for central-eastern New Jersey and the northern Jersey Shore; it became mandatory on December 6, 1997.
- 1997 — 973 split off from 201 on June 1 for the northern interior (Essex, Passaic, Morris, and Sussex counties), leaving 201 with the northeastern corner.
- 1999 — 856 split off from 609 for southwestern New Jersey (Camden, Cherry Hill, Vineland). It remains one of two New Jersey codes without an overlay.
- 2001 — 551 activated as an overlay of 201 in northeastern New Jersey, the state's first overlay code.
- 2001 — 862 activated as an overlay of 973 in the northern interior.
- 2001 — 848 activated on December 29 as an overlay of 732 in central-eastern New Jersey.
- 2018 — 640 activated as an overlay of 609 in central and southern New Jersey, the state's most recent area code.
Why New Jersey Needs So Many Area Codes
A single area code can hold roughly 7.9 million possible phone numbers in theory — 792 valid central office codes (the second three digits) multiplied by 10,000 line numbers each. In practice the usable count is lower, because blocks of numbers are reserved, withheld, or assigned in bulk to carriers that may never fully use them. When the pool of available numbers in an area code falls below the threshold the North American Numbering Plan Administrator (NANPA) tracks, the state requests relief, and either a split or an overlay is approved.
New Jersey’s population of roughly 9,500,851 residents would, on its own, fit comfortably inside a single area code’s capacity. The reason 10 codes are needed instead is that every adult typically carries at least one mobile line, many households have multiple lines per person, businesses concentrate phone numbers at extreme density, and connected devices, VoIP services, and second-line apps all draw from the same pool. The math compounds quickly.
Because New Jersey sits in the top tier of states by code count, the relief pattern over the past two decades has been almost exclusively overlay-based. Overlays add a new code on top of the existing geography rather than splitting it, which means no existing customer has to change their number — the only adjustment is that all local calls become ten-digit. The trade-off is invisible to most users today, since contact lists handle dialing automatically.
New Jersey Area Codes by Region
Northeastern New Jersey (201, 551): Jersey City, Hoboken, Hackensack, and the Bergen and Hudson county suburbs across the river from New York City. 201 is the original 1947 code; 551 overlay added in 2001.
Northern interior (973, 862): Newark, Paterson, Clifton, and Morristown across Essex, Passaic, Morris, and Sussex counties. 973 split off from 201 in 1997; 862 overlay added in 2001. This is the state's most populous numbering plan area.
North-central New Jersey (908): Elizabeth, Plainfield, and the Union, Somerset, Hunterdon, and Warren county areas. Split off from 201 in 1991; one of only two New Jersey codes without an overlay.
Central-eastern New Jersey (732, 848): Edison, New Brunswick, Toms River, and the northern Jersey Shore across Middlesex, Monmouth, and Ocean counties. 732 split off from 908 in 1997; 848 overlay added in 2001.
Central and southern New Jersey (609, 640): Trenton, Princeton, Atlantic City, and Mercer County. 609 split off from 201 in 1956; 640 overlay added in 2018.
Southwestern New Jersey (856): Camden, Cherry Hill, Vineland, and the Gloucester and Salem county areas in the Philadelphia suburbs. Split off from 609 in 1999; no overlay.
What’s Next for New Jersey Area Codes
New Jersey’s ten area codes give it relief headroom in every region for the foreseeable future. NANPA’s April 2025 NPA exhaust analysis projects the two non-overlaid codes as the first pressure points: 908 in north-central New Jersey is forecast to exhaust around the first quarter of 2033, and 856 in the southwest around the third quarter of 2032. Both dates are well beyond the 36-month window that triggers formal relief planning, so no New Jersey numbering plan area is currently on the active relief schedule. When relief does become necessary, an overlay is the likely method, since every recent New Jersey addition has been an overlay rather than a split.
Frequently Asked Questions
How many area codes does New Jersey have right now?
New Jersey has 10 active area codes in service across the territory it covers, including any overlays that share geography with an older code.
What is the oldest area code in New Jersey?
201 is the oldest active area code in New Jersey, assigned in 1947 when the North American Numbering Plan launched. It remains in service today, though its geographic footprint has typically been reduced by subsequent splits and overlays.
What is the newest area code in New Jersey?
The most recent area code addition to New Jersey was 640, activated in 2018. New phone lines provisioned in its service area are increasingly drawn from this code as older overlays approach exhaustion.
Why does New Jersey need so many area codes?
Population growth combined with the proliferation of mobile lines, business direct-dial numbers, VoIP services, and connected devices has exhausted older codes faster than the original 1947 plan anticipated. Each new area code adds roughly 7.9 million additional phone numbers to the regional pool.
Which area codes cover Newark and northern New Jersey?
Newark, Paterson, Clifton, and the rest of the northern interior are served by 973 and its overlay 862. 973 split off from 201 in 1997, and 862 was added as an overlay in 2001. Both serve the same Essex, Passaic, Morris, and Sussex county region, so ten-digit dialing is required.
Which area code covers Jersey City and Hoboken?
Jersey City, Hoboken, and the Bergen and Hudson county suburbs use 201 and its overlay 551. 201 is the original New Jersey area code from 1947 and was the first code ever assigned in the North American Numbering Plan; 551 was added as an overlay in 2001.
Why does New Jersey need ten area codes?
New Jersey is the most densely populated state in the country, with about 9.5 million people packed into 21 counties next to two major metro areas, New York City and Philadelphia. Demand for phone lines, cell numbers, and business lines led to a series of splits in the 1990s and overlays in the 2000s, leaving the state with ten active codes today.
Is 640 a real New Jersey area code?
Yes. 640 is New Jersey’s newest area code, activated in 2018 as an overlay of 609. It covers the same central and southern region as 609, including Trenton, Princeton, and Atlantic City, and new numbers in that area may be assigned either code.
Ready to Get a Number in New Jersey?
We carry available New Jersey numbers right now across multiple area codes. Order directly in 201, 732, 862, 908, or 551 — a one-time fee, no monthly charges, with pricing From $150 depending on the digit pattern and memorability of the number. Prefer help choosing? Call us at (212) 580-2000.
