not yet, but we are waiting for somebody to go deep into it. nostr:npub1nlk894teh248w2heuu0x8z6jjg2hyxkwdc8cxgrjtm9lnamlskcsghjm9c and I tried a kind:30053 for DNS records many months ago. The goal back then would be to not have a relay list with domain names, but a relay list with pubkeys that in turn point to IPs. Maybe he is still offering that event for his relays. We just never really went for it.