What is what area code is 640?

Area code 640 is currently unassigned and reserved for future use by the North American Numbering Plan Administrator (NANPA). The NANP is the system used to assign telephone numbers in the United States, Canada, and various other countries in North America.

There is not much information available about area code 640 as it has not been allocated to any specific geographic area or region. It is possible that this area code will eventually be used if there is a need for additional telephone numbers in the future.

In the meantime, if you receive a call from a number with area code 640, it is likely a scam or spam call using a fake or spoofed number. It is best to avoid answering calls from unfamiliar numbers and never give out personal information to unknown callers.