Prefix Information
The prefix 721 is part of area code 215 serving Philadelphia, Pennsylvania.
This exchange contains 10,000 possible phone numbers (215-721-0000 through 215-721-9999).
Phone numbers with prefix 721 in area code 215. Location: Philadelphia, Pennsylvania.
The prefix 721 is part of area code 215 serving Philadelphia, Pennsylvania.
This exchange contains 10,000 possible phone numbers (215-721-0000 through 215-721-9999).