640 Area Code
New Jersey, USA
Local time now · Eastern Time
3:43 AM
Area code 640 is in New Jersey, USA, serving Hamilton Township, Trenton, Manchester Township and Atlantic City. It uses Eastern Time — the time there now is 3:43 AM. 609 is an overlay for the same area, so local calls need 10-digit dialing. In service since 2018.
| Area code | 640 |
|---|---|
| Location | New Jersey, USA |
| Major cities | Hamilton Township, Trenton, Manchester Township, Atlantic City, Princeton, Lacey Township, Stafford Township, Barnegat Township |
| Time zone | Eastern Time |
| Overlay codes | 609 |
| In service since | 2018 |
| Dialing | 1+10 digits for HNPA calls permissible at each service provider's discretion. |
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Frequently asked questions
Where is area code 640?
New Jersey, USA — including Hamilton Township, Trenton, Manchester Township, Atlantic City and Princeton.
What time zone is area code 640?
Eastern Time.
How do I call a 640 number from abroad?
Dial your international access code, then 1 (the country code), then 640 and the 7-digit number — for example +1 640 555 0100. From the UK or India dial 00 1 640 …; from Bangladesh 00 1 640 … .
Is a call from 640 a scam?
Not by itself — 640 is an ordinary geographic area code in New Jersey. Numbers can be spoofed, so be careful with unexpected calls asking for money or personal details.
Sources: North American Numbering Plan Administrator (NANPA) NPA database (10/25/2026); major cities from Wikidata (CC0). An area code shows where a number was first assigned — with number portability and mobile phones, the caller may be anywhere.