Prefix Information
The prefix 688 is part of area code 410 serving Baltimore, Maryland.
This exchange contains 10,000 possible phone numbers (410-688-0000 through 410-688-9999).
Phone numbers with prefix 688 in area code 410. Location: Baltimore, Maryland.
The prefix 688 is part of area code 410 serving Baltimore, Maryland.
This exchange contains 10,000 possible phone numbers (410-688-0000 through 410-688-9999).