NC - Speeding = License Suspension
In NC Speeding over 15 MPH = 3-6 month license suspension. I got ticket in Virginia and 1 year later got letter from NC DMV.
If i would have contested the speeding ticket instead of just mailing in the check it may not have shown up. Eventually had to go to a 1/2 day driving class so that my license would not be suspended.
If you already have 2 tickets - i would recommend contesting in court and hopefully having it not appearing on your record.