I checked other mirrors. Some of them also have the same problem. Even high ranked ones, like https://archlinux.org/mirrors/moson.org/ or https://archlinux.org/mirrors/osbeck.com/.

As is in my case "guilty" server(s) is/are: 

49.12.124.107
2a01:4f8:242:5614::2

Thanks for investigating this issue and good luck.

пн, 20 февр. 2023 г. в 14:22, Jelle van der Waa <jelle@vdwaa.nl>:
Hi,

On 20/02/2023 12:28, Aleksandr Muravja wrote:
> Well, kyberog != kyberorg.

Oof, well it resolves fine.

[jelle@gemini ~]# dig arch.kyberorg.fi

; <<>> DiG 9.18.11 <<>> arch.kyberorg.fi
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10523
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;arch.kyberorg.fi.              IN      A

;; ANSWER SECTION:
arch.kyberorg.fi.       291     IN      A       135.181.204.71

Noticed now that arch.kyberorg.fi also fails:

https://arch.kyberorg.fi/       https    Finland        Name or service not known       

So this is a Python application so I'll do some digging what's wrong!

Greetings,

Jelle