Number plates in Keppera Grove State, Liftland

Keppera Grove State in Liftland requires its residents to display number plates. Current number plates in this state are given the Californian format of one number, three letters and three numbers, which was introduced in 1995 ( 1ABC·123 ). The Californian 1ABC123 format is also used in the state of Western Australia in Australia (since 1997) and in Belgium (since 2010).

Previous series
Keppera Grove State was once used the  aaa·nnn format and was allocated  CYA·001 to CZH·999 under a federal scheme starting from 1938, and ran until 1956. Then it was changed into an naa·nnn format where the first n was an index digit ranging from 2 to 9. The system ran until 1995 when the current naaa·nnn format was adopted.

The index digit on the naa·nnn indicated the age of registration:
 * 2aa·nnn : 1956-1960;
 * 3aa·nnn : 1960-1965;
 * 4aa·nnn : 1965-1970;
 * 5aa·nnn : 1970-1974;
 * 6aa·nnn : 1974-1978;
 * 7aa·nnn : 1978-1982;
 * 8aa·nnn : 1982-1986;
 * 9aa·nnn : 1986-1995.

Current series
Since 1995, the Californian format 1ABC123 format was adopted, and number plates now look like this: naaa·nnn. Like the previous number plate, the index digit (the first n) indicated age of registration, and changes by 1 every ten years.
 * 1aaa·nnn : 1995-2005
 * 2aaa·nnn : 2005-2015
 * 3aaa·nnn : 2015-2025

Disallowed letter combinations
The three-letter combinations FUC, FUK, KNT, BCH, FAG, CNT, ASS, DIK, COK, III and OOO were not used on Keppera Grove number plates, the first nine because they are dirty words, and the last two to ease camera recognition failures with numbers 111 (one, one, one) and 000 (zero, zero, zero) respectively. 000 is not a valid group of three numbers, and 666 was not a valid number on CYA-CZH, 2aa, 3aa, 4aa and 5aa series. The letter Q is not used in passenger number plates; they are only used in trailer vehicles, public transport vehicles and special vehicles.

Thus, based on the above information, the current format can only produce 9 x ((25 x 25 x 25)-9) x 999 = 140,403,456 combinations in the new system.