Area code 640 – New Jersey
640 has served New Jersey since 2018, split from 609. It is still largely empty: 134 of 786 number blocks allocated. No carrier dominates: AT&T 26.1%, Other CLEC / VoIP 24.6%, Onvoy / Inteliquent 20.1%. It shares its geography with overlay codes 609, so local calls take all ten digits. Spam complaints are comparatively rare: 239 in the 33 days to 30 October 2026, 326th of the 422 codes with five or more complaints.
- State
- New Jersey
- In service since
- 2018
- Time zone
- Eastern
- Shares area with
- 609
Who holds 640 number blocks
Share of the 134 assigned NXX blocks (17% of the 786 possible), across 23 carriers. This is share of number blocks, not of subscribers.
- AT&T26.1%
- Onvoy20.1%
- Other CLEC / VoIP20.1%
- T-Mobile11.9%
- Verizon6.7%
- Bandwidth5.2%
- Charter3.7%
- Dish3%
- Comcast1.5%
- TPx0.7%
- 8x80.7%
Spam complaints naming 640
FTC Do Not Call complaints where the caller ID was a 640 number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are frequently spoofed, so these are complaints about the code, not calls proven to originate in it.
Rate centers in 640
NANPA allocates number blocks to rate centers and records their names abbreviated to ten characters, so these are NANPA's codes rather than place names – CHAMPAURBN is Champaign-Urbana, NWYRCYZN01 is a New York City zone. We show them unchanged instead of guessing at the full names. Showing the largest 5 of 35.
Timeline
- 2018 640 goes into service, split from or overlaid on 609.
More about 640
Separate pages for the questions that need their own answer: what time it is there, what the complaint data says, who holds the number blocks, and how the code compares with the one it shares its area with.
Frequently asked about 640
What state is area code 640?
New Jersey. It covers the same area as 609/640.
Is a call from 640 a scam?
Not by itself. 640 drew 239 FTC complaints in the 33 days to 30 October 2026, 326th of 422 ranked codes – mid-pack or lower. Spam callers spoof caller IDs, so the only useful check is the full number.
Which carrier owns 640 numbers?
AT&T holds the largest share of assigned number blocks at 26.1%. The rest is spread across 3 other carriers. This is share of number blocks, not of subscribers – people keep their numbers when they switch carriers.
Do I need to dial 10 digits in 640?
Yes – ten digits for local calls in 640, because it shares its area with another code.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 25 daily files 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
NANPA dialing note for this code: “10D”. Reviewed by the data desk. Spotted an error? Request a correction.