Prefix Information
The prefix 991 is part of area code 808 serving Honolulu, Hawaii.
This exchange contains 10,000 possible phone numbers (808-991-0000 through 808-991-9999).
Phone numbers with prefix 991 in area code 808. Location: Honolulu, Hawaii.
The prefix 991 is part of area code 808 serving Honolulu, Hawaii.
This exchange contains 10,000 possible phone numbers (808-991-0000 through 808-991-9999).