Prefix Information
The prefix 257 is part of area code 218 serving Duluth, Minnesota.
This exchange contains 10,000 possible phone numbers (218-257-0000 through 218-257-9999).
Phone numbers with prefix 257 in area code 218. Location: Duluth, Minnesota.
The prefix 257 is part of area code 218 serving Duluth, Minnesota.
This exchange contains 10,000 possible phone numbers (218-257-0000 through 218-257-9999).