Prefix Information
The prefix 640 is part of area code 202 serving Washington, Washington DC.
This exchange contains 10,000 possible phone numbers (202-640-0000 through 202-640-9999).
Phone numbers with prefix 640 in area code 202. Location: Washington, Washington DC.
The prefix 640 is part of area code 202 serving Washington, Washington DC.
This exchange contains 10,000 possible phone numbers (202-640-0000 through 202-640-9999).