Prefix Information
The prefix 991 is part of area code 580 serving Lawton, Oklahoma.
This exchange contains 10,000 possible phone numbers (580-991-0000 through 580-991-9999).
Phone numbers with prefix 991 in area code 580. Location: Lawton, Oklahoma.
The prefix 991 is part of area code 580 serving Lawton, Oklahoma.
This exchange contains 10,000 possible phone numbers (580-991-0000 through 580-991-9999).