Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — AREA-CODE/640

640 area code

Area code 640 is in New Jersey. It covers Trenton, Egg Harbor Township, Atlantic City and 124 other places: 112 ZIP codes in Mercer, Burlington, Atlantic and 5 other counties. Local time there is , Eastern Time. In service since 2018 as an overlay: it covers the same area as 609, so a number from there can have either code.

Time zone
Eastern
Largest city
Trenton
Overlays
609
In service since
2018
Rate centres
35
Prefixes assigned
132 (1,320,000 numbers)

Who calls from a 640 number

NANPA records the carrier each block of 640 numbers is assigned to. Of the 1.2 million 640 numbers assigned, 51% are with mobile carriers (AT&T Mobility, Verizon Wireless and T-Mobile); 49% with cable, internet-calling, business and other carriers (Onvoy, Bandwidth and Coretel New Jersey).

That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.

Carriers holding the most 640 numbers
CarrierKindShare
AT&T MobilityMobile34%
OnvoyCable, VoIP, other31%
Verizon WirelessMobile8%
T-MobileMobile8%
BandwidthCable, VoIP, other3%
Coretel New JerseyCable, VoIP, other2%

An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.

Places in area code 640

The 34 places with a telephone rate centre of their own using 640, largest first. Each links to its ZIP codes.

Places in area code 640
PlaceZIP codesPopulation
Trenton, NJ 27 90,338
Atlantic City, NJ 3 38,632
Princeton, NJ 5 30,756
Medford, NJ 1 29,109
Mount Holly, NJ 1 25,835
Plainsboro, NJ 1 20,817
Pleasantville, NJ 1 20,712
Hammonton, NJ 1 14,840
Mercerville, NJ — 13,535
Ocean City, NJ 1 11,261
Somers Point, NJ 1 10,515
Burlington, NJ 1 9,993
Fort Dix, NJ — 7,984
Mays Landing, NJ 1 6,406
Hightstown, NJ 1 5,920
Cape May Court House, NJ 1 5,628
Florence, NJ 1 5,242
Wildwood, NJ 1 5,130
Egg Harbor City, NJ 1 4,400
Bordentown, NJ 1 4,026
Lawrenceville, NJ — 3,924
Tuckerton, NJ 1 3,654
Barnegat, NJ 1 3,360
Cranbury, NJ 1 2,185
New Egypt, NJ 1 2,050
Sea Isle City, NJ 1 2,000
Allentown, NJ 1 1,702
Avalon, NJ 1 1,488
Pemberton, NJ 1 1,312
Beach Haven, NJ 1 1,055
Milmay, NJ 1 748
Dennisville, NJ 1 736
Vincentown, NJ 1 531
Tuckahoe, NJ 1 175

Nearby places using 640

These places have no rate centre of their own in NANPA's records; the nearest one uses 640. Near an area-code boundary that can be wrong for part of a town.

ZIP codes in area code 640

112 ZIP codes in 79 towns, by the town each is mailed to, largest first. Each links to its own page.

Where 640 numbers are issued

NANPA's rate centres with the most 640 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.

Rate centres using area code 640
Rate centrePlacePrefixes
ATLNTIC CY Atlantic City 17
LAWRENCEVL Lawrenceville 17
PLEASANTVL Pleasantville 14
PRINCETON Princeton 7
TRENTON Trenton 7
ALLENTOWN Allentown 6

Counties

The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.

Which code covers where you are now? What area code am I in? answers from your location.

Questions about area code 640

Where is area code 640?

Area code 640 is in New Jersey. It covers Trenton, Egg Harbor Township, Atlantic City and 124 other places: 112 ZIP codes in Mercer, Burlington, Atlantic and 5 other counties.

What ZIP codes are in area code 640?

112 ZIP codes, by the town each is mailed to: Trenton (27, 08601 to 08695), Egg Harbor Township (08234), Atlantic City (3, 08401 to 08405), Lawrence Township (08648) and 75 more towns. The full list is on this page.

What time zone is area code 640 in?

Eastern time.

Is a 640 number a mobile or a landline?

It can be either. 51% of 640 numbers are assigned to mobile carriers and 0% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.

What area codes overlay 640?

609. They cover the same area as 640, so a new number there can be given any of them.

Does a 640 number mean the caller is in New Jersey?

Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 640 call can come from anywhere.

Other area codes in New Jersey

All 10 New Jersey area codes, by area, with the cities each covers

Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.

Cite this page

zipcodes.pro. “Area code 640.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/640

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