How to get a free .arpa domain

This post is also available over on get-arpa-domain.0.4.1.0.9.0.f.1.0.7.4.0.1.0.0.2.ip6.arpa! On the internet, .arpa is the top level domain reserved for critical internet infrastructure. It isn't open to public registration, so you can't own mysite.arpa sadly. However, this isn't the only way to reserve some real-estate on .arpa - there are many different services that you can abuse to get your own DNS records, and hence your own website. I first learned about this through a blog post explaining e164.arpa, an old scheme where you could query information about phone numbers using DNS. If you're German or Czech, you can sign up and control the DNS records that correspond to your phone number! For the rest of the world, our phone numbers aren't open to registration, so that isn't an option. Instead, we can use a similar scheme under ip6.arpa. This is reserved for "reverse DNS lookups", where you can turn IPv6 addresses into domain names, instead of the other way around. However, nothing…