Oklahoma License PlatesCounty allocation system through 2008, although the system began to break down to a more random distribution before the end of the issue. The new 2009 base is not county coded, but new black-on-white month stickers with county coding are now in use as of 2011. They have a two-digit code for the month (i.e. 01 for January) and a two-letter code for the county (DL=Delaware), with the county name spelled out beneath.
A new base for Oklahoma went on sale January 2, 2009.
12 - white on maroon
13 - black on orange
14 - white on blue
15 - black on yellow