>>1020494>>1021183>JEBHah. In Hungary, we avoided almost all embarrassing codes, but some remained, e.g. JEW, GAY, etc. In Germany, "brown" codes are also prohibited (SS, SD, etc.) - we haven't even thought about it yet, so e.g. AVH is also an existing code.
Our system started to work in 1990, and the older ones disappeared until 2000 thanks to a renumbering process, which have lasted for 10 years.