Prefix Information
The prefix 311 is part of area code 667 serving Baltimore, Maryland.
This exchange contains 10,000 possible phone numbers (667-311-0000 through 667-311-9999).
Phone numbers with prefix 311 in area code 667. Location: Baltimore, Maryland.
The prefix 311 is part of area code 667 serving Baltimore, Maryland.
This exchange contains 10,000 possible phone numbers (667-311-0000 through 667-311-9999).