Prefix Information
The prefix 631 is part of area code 608 serving Madison, Wisconsin.
This exchange contains 10,000 possible phone numbers (608-631-0000 through 608-631-9999).
Phone numbers with prefix 631 in area code 608. Location: Madison, Wisconsin.
The prefix 631 is part of area code 608 serving Madison, Wisconsin.
This exchange contains 10,000 possible phone numbers (608-631-0000 through 608-631-9999).