I'm in California. On my 1962 Fairlane, it's in the AAA 000 format. On the 1981 Honda that I brought here in 1999, it's 0AAA000, as is the plate on my mom's '99 Taurus. On my dad's 1994 Ranger, it's 0A000A0.
Basically, they switched to seven characters a while back, but the format changes from year to year.