These series are used for International Organizations, for example UNESCO.
CD-09-99 series
2000 -current
The earlier CD-series had also 3 digits, for example CD-861. Since 2000 with the new GAIK-system these series did get an extra zero, so now it is CD-08-61.
CD-19-99 series
The regular CD-codes. There are no country codes used.
2000 - current
Temporary license plate with code 11 (november). Officially CD-plates will not be replaced with a duplicate code if a license plate is lost/stolen. If CD-plate have been stolen or lost, this combination will be out of registration and replaced by a total new combination. This license plate is the only one ever made.
One time issued
CDJ-99(9) series
2000 - current
The CD-J series are used for the Internation Court of Justice at The Hague (Den Haag)