Prefix Information
The prefix 257 is part of area code 302 serving Wilmington, Delaware.
This exchange contains 10,000 possible phone numbers (302-257-0000 through 302-257-9999).
Phone numbers with prefix 257 in area code 302. Location: Wilmington, Delaware.
The prefix 257 is part of area code 302 serving Wilmington, Delaware.
This exchange contains 10,000 possible phone numbers (302-257-0000 through 302-257-9999).