Prefix Information
The prefix 311 is part of area code 539 serving Tulsa, Oklahoma.
This exchange contains 10,000 possible phone numbers (539-311-0000 through 539-311-9999).
Phone numbers with prefix 311 in area code 539. Location: Tulsa, Oklahoma.
The prefix 311 is part of area code 539 serving Tulsa, Oklahoma.
This exchange contains 10,000 possible phone numbers (539-311-0000 through 539-311-9999).