@kinderstampfer @catsalad @inthehands @maxleibman
Fun fact: the DDR had .dd as a ccTLD (in theory) until something more important than the Internet happened in 1989.
The ISO 3166-1 code "DD" was withdrawn in 1990.
https://en.wikipedia.org/wiki/.dd
The only .dd domain that I knew of was for Friedrich Schiller University Jena, but apparently TU Dresden also had one. And maybe also Zeiss (Jena).
Every .dd domain was renamed to the equivalent .de domain.
https://internet.robert-scheck.de/tld-dd
https://www.mdr.de/geschichte/zeitgeschichte-gegenwart/ddr-internet-domain-100.html