I reached out to Cloudflare support about this issue a few weeks ago, and they claim that it is an issue on archive.is’s end, and that they are returning the wrong IP to Cloudflare’s resolver.
They said
> We've escalated the issue to our DNS team and we got a feedback from the team that archive is not giving a correct answer for DNS queries from Cloudflare.
>
> This is not something that in our control and can be resolved from our end. Apologies that you experience this.
A workaround is to add the IP to your /etc/hosts file.
```
46.45.185.30 archive.is
46.45.185.30 archive.today
46.45.185.30 archive.fo
```