[lowpro]

Usually if a response is greater than 512 bytes the DNS server will renegotiate on TCP 53. Note some DNS servers might not do this, but every normal implementation does that I’m aware of.

[piperswe]

Historically musl libc didn't support TCP DNS, but even musl supports it now [1]

[1]: https://www.theregister.com/2023/05/16/alpine_linux_318/