Prefix Information
The prefix 603 is part of area code 959 serving Hartford, Connecticut.
This exchange contains 10,000 possible phone numbers (959-603-0000 through 959-603-9999).
Phone numbers with prefix 603 in area code 959. Location: Hartford, Connecticut.
The prefix 603 is part of area code 959 serving Hartford, Connecticut.
This exchange contains 10,000 possible phone numbers (959-603-0000 through 959-603-9999).