New State of New Jersey area code 640

From 1958 to 1999 the southern part of New Jersey was served by area code 609. In 1999 the Numbering Plan Area 609 was split into two with the new area code 856 covering the south-western portion of NJ. Today, once again, a relief plan is needed for area code 609. The approved relief method is an overlay code which will serve the same south eastern NJ area currently covered by NPA 609. The new area code 640 will enter service next year in September. As a result of the newly created overlay complex 609/640, 10 digit dialing will be mandatory for all calls within its borders.

Key dates

  • January 20, 2018 – permissive 10 digit dialing begins (10 digit dialing is encouraged)
  • August 18, 2018 – mandatory 10 digit dialing begins
  • September 17, 2018 – area code 640 enters service

7 digit calls between 609 and 856 to be eliminated

Since the 1999 split of NPA 609 some calls between area codes 609 and 856 could be dialed using 7 digits. With the above changes these protected NXX codes will also be eliminated and regular 1+10 digit dialing will be required for all calls between the two NPAs.

See official NANPA announcement and map of the new overlay complex (PDF document)

10 thoughts on “New State of New Jersey area code 640”

  1. Hello Bill, I haven’t used 1 for any of my calls for years. Dialing 1 used to get the operator involved and that would be an extra charge. I don’t use 1 on my cell or my land line. So why now are we getting the number 1 involved? Didn’t they forsee the future when they created the 856 area code? As usual it doesn’t get better. It only gets worse. This affects a lot of businesses.

  2. I was looking up where the 640 area code was bc I just a call from that area code but didn’t the article say that the code was not being released untill September of 2018?

  3. Indeed this area code will be activated in September. I don’t know how it was possible for you to receive a call from a phone number using area code 640. Have you tried calling it back?

  4. Could not a caller-id-spoofing device generate a number in area code 640, even before that area code goes live?

  5. I believe 1 is the county code for the United States. I was in Brazil a few years ago an needed to call my home in the U.S. I just dialed 1-609-xxx-xxxx, needed no operator just dialed direct.

  6. I just got a reply from an ad I placed on Craigslist with a 640 area code. Unfortunately I wrote a text then googled 640 and discovered that it might be a scam and 640 isn’t activating until September 18, 2018 and it’s only September 11. Worried, I was merely trying to rent my mountain cabin

  7. I’m in the 609 area code. Your maps of the new assignment of area codes just gives a general map & states they are now combined into 609/640. Well, how do I tell if the person I’m trying to call is in which area code?

  8. Hi Linda,
    Apologies for the late reply. In the case of of overlaying area codes existing phone numbers can only be in the old area code (the one being overlaid by the new one). Once the new area code enters service all phone calls are dialed using 10 digits so, at least in theory people will provide their full 10 digit number. I hope this makes sense.

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