Prefix Information
The prefix 644 is part of area code 240 serving Germantown, Maryland.
This exchange contains 10,000 possible phone numbers (240-644-0000 through 240-644-9999).
Phone numbers with prefix 644 in area code 240. Location: Germantown, Maryland.
The prefix 644 is part of area code 240 serving Germantown, Maryland.
This exchange contains 10,000 possible phone numbers (240-644-0000 through 240-644-9999).