640 area code — Atlantic City, NJ geographic
- State
- New Jersey
- Major area
- Atlantic City
- Time zone
- Eastern
- In service since
- 2018-09-17
- Split from
- 609
- Overlay complex
- 609 / 640
- Active prefixes
- 123
- Rate centers
- 35
- Carriers
- 20
- Projected exhaust
- 3Q 2046
640 is the area code for Atlantic City, New Jersey, in service since September 17, 2018, Eastern time. The same territory is also served by its overlay code (609/640 complex). Keep in mind the code identifies where the number was registered; the person calling may be elsewhere.
The code currently holds 123 working prefixes, held by 20 different carriers. Of these, 123 are pooled prefixes shared by multiple carriers. Numbers are anchored to 35 rate centers — billing localities that fix where each prefix belongs.
If a 640 call asks for money or personal data, treat the displayed number as unverified: hang up and reach the organization through its published number. Numbering data locates numbers, not callers.
Local calls inside 640 are dialed 10D; 1+10 digits for hnpa calls permissible at each service provider's discretion..
The current NANPA exhaust forecast for the 609/640 complex is 3Q 2046.
The code was carved out of 609 (2018).
Largest localities in 640
| Locality (rate center) | Active prefixes | Also served by |
|---|---|---|
| Atlantic City | 16 | 609 |
| Lawrenceville | 16 | 609 |
| Pleasantville | 13 | 609 |
| Princeton | 7 | 609 |
| Trenton | 6 | 609 |
| Cranbury | 5 | 609 |
| Barnegat | 5 | 609 |
| Mount Holly | 4 | 609 |
| Allentown | 4 | 609 |
| New Egypt | 4 | 609 |
FAQ
Why am I getting spam calls from 640 numbers?
Scammers spoof recognizable area codes so calls look local or familiar. A displayed 640 number does not prove the call originated there — see our guide to spotting spoofed calls.
Where is a 640 number from?
640 is assigned to Atlantic City and surrounding areas of New Jersey in the Eastern time zone. The three digits after the area code (the prefix) narrow it down to a rate center.
Is 640 a toll-free number?
No. 640 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.
Why do 609 and 640 cover the same place?
They are overlays: when a code runs low on numbers, a new code is added over the same territory instead of splitting it. The 609/640 complex shares one service area, and local calls are dialed with 10 digits.