640 Area CodeTrenton, NJ
Area code 640 covers Trenton and nearby communities in New Jersey, in the Eastern Time (ET) zone, home to about 582,000 people across 106 cities. It's the only area code for this region, so the three digits alone place the caller.
Overview
- Major City
- Trenton
- State
- New Jersey (NJ)
- Timezone
- Eastern Time (ET)
- Current Time
- Overlay
- No – unique area code
Where is area code 640?
Area code 640 serves part of Trenton, NJ and the surrounding areas. It is a unique area code with no overlays.
Overview of the 640 Area Code
What is the 640 area code?
The 640 area code serves Trenton, New Jersey. When you see a 640 number, it indicates a local number within this geographic area.
Why was area code 640 created?
The 640 area code was established to serve the Trenton region in New Jersey. It provides telephone number coverage across 106 cities.
Geographic Coverage of the 640 Area Code
The 640 area code serves Trenton and surrounding areas in New Jersey. It operates within the Eastern Time (ET) time zone. This area code covers several key cities, including:
- Trenton
- Atlantic City
- Princeton
- Pleasantville
- Ocean Acres
- Hammonton
Got a call from a 640 number? It came from Trenton, NJ. No other area code overlaps the 640 territory, so the prefix alone identifies where the caller is. Inside 640, Trenton holds about 16% of the population; the rest is split across 105 smaller cities.
Trenton Area Code Overview
The 640 area code provides comprehensive telephone coverage for Trenton and its surrounding communities. As the sole area code for this region, it uniquely identifies all local numbers within the service area.
What cities does area code 640 cover?
| City | State | Population | % of Area Code | % of City |
|---|---|---|---|---|
| Trenton | NJ | 91,193 | 0% | 100% |
| Atlantic City | NJ | 38,959 | 1% | 100% |
| Princeton | NJ | 31,445 | 0% | 100% |
| Pleasantville | NJ | 20,924 | 0% | 100% |
| Ocean Acres | NJ | 16,142 | 0% | 100% |
| Hammonton | NJ | 15,036 | 2% | 100% |
| Princeton Meadows | NJ | 13,834 | 0% | 100% |
| Mercerville | NJ | 13,230 | 0% | 100% |
| Hamilton Square | NJ | 12,784 | 0% | 100% |
| Browns Mills | NJ | 11,223 | 0% | 100% |
* Sources: Population – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). Area code assignments – NANPA CO Code data. See our data methodology.
Has area code 640 been reported for unwanted calls?
Yes – 101 unwanted-call complaints were reported to the FTC for numbers showing a 640 area code (May 29 – Jul 2, 2026).
- 66% robocalls
- ↓ 9% vs prior period
Most-reported subjects
- Other37%37
- Dropped call or no message17%17
- Reducing your debt (credit cards, mortgage, student loans)12%12
* Caller ID is easily spoofed, so these figures reflect the number shown on caller ID, not the caller's true location – an area code alone never identifies a caller. The FTC does not verify the facts in these complaints. Source: FTC Do Not Call (DNC) Reported Calls Data, retrieved 2026-07-05.
Which prefixes and exchanges belong to area code 640?
7% assigned to a telco
- 87% Landline
- 13% Wireless
- 0% Unknown
| Prefix | Usage | Carrier |
|---|---|---|
| (640)200- | Landline | Onvoy |
| (640)201- | Landline | Ip Horizon |
| (640)202- | Landline | Ip Horizon |
| (640)203- | Wireless | Verizon Wireless |
| (640)204- | Wireless | Verizon Wireless |
| (640)205- | Landline | Comcast Ip Phone |
| (640)206- | Landline | Comcast Ip Phone |
| (640)207- | Landline | Bandwidth.Com Clec |
| (640)208- | Wireless | Verizon Wireless |
| (640)209- | Landline | Omnipoint Communications Enterprises |
Frequently Asked Questions about the 640 Area Code
Who called me from a 640 number?
A 640 number is assigned to Trenton, New Jersey, so a call may come from there. But caller ID is easy to fake, and scammers often spoof a local 640 code to look nearby, so a 640 number doesn't prove the caller is local. Recently, 101 unwanted-call complaints were reported to the FTC for numbers showing the 640 code (66% flagged as robocalls). If you don't recognize the number, let it go to voicemail; a real caller will leave a message.
Is 640 a scam area code?
No area code is a scam on its own. 640 is a normal, officially assigned code for Trenton, New Jersey. Spam callers spoof local codes to raise the odds you answer, so 640 on your caller ID says nothing about who is really calling. Recently, 101 unwanted-call complaints were reported to the FTC for numbers showing the 640 code (66% flagged as robocalls). Judge the call itself, not the area code.
Why do I keep getting calls from the 640 area code?
Repeated calls from different 640 numbers are usually spoofing: a robocaller rotates through 640 numbers so each call looks local and slips past simple blocks. Recently, 101 unwanted-call complaints were reported to the FTC for numbers showing the 640 code (66% flagged as robocalls). Blocking one number rarely helps; voicemail screening, your carrier spam filter, and the Do Not Call Registry work better.
Should I answer an unknown 640 number?
If you aren't expecting a 640 call, let it ring to voicemail. Legitimate callers leave a message, most robocallers hang up when no one picks up, and answering can mark your number as active and bring more calls.
How do I block calls from the 640 area code?
Block a single 640 number from your recent-calls list (iPhone: tap the number, then Block this Caller; Android: tap the number, then Block or report spam). To cut the volume, turn on Silence Unknown Callers on iPhone or spam protection on Android, enable spam filtering from your carrier, and register at DoNotCall.gov. Blocking the entire 640 code also stops legitimate local calls, so use it only as a last resort.
Where is area code 640?
Area code 640 covers Trenton and the surrounding area in New Jersey, spanning 106 cities with about 581,946 residents. No other code overlays this region, so 640 alone identifies the area.
Is 640 a real area code?
Yes. 640 is an active code in the North American Numbering Plan, assigned by NANPA and in service for Trenton, New Jersey. A real code can still show up on spoofed spam calls, so treat unknown 640 calls with normal caution.
What timezone is the 640 area code in?
The 640 area code is in the Eastern Time (ET). Because a number can be kept when someone moves or switches to VoIP, a specific 640 caller may not be in that zone.
How do I call a 640 number from abroad?
From outside the US, dial your country's exit code, then 1 (the US country code), then 640 and the seven-digit number. From a mobile phone you can usually just enter +1 640 followed by the number and let the phone add the exit code for you.