Prefix Information
The prefix 721 is part of area code 218 serving Duluth, Minnesota.
This exchange contains 10,000 possible phone numbers (218-721-0000 through 218-721-9999).
Phone numbers with prefix 721 in area code 218. Location: Duluth, Minnesota.
The prefix 721 is part of area code 218 serving Duluth, Minnesota.
This exchange contains 10,000 possible phone numbers (218-721-0000 through 218-721-9999).