user47827: BOLT 10 describes a node discovery mechanism based on DNS.
The query semantics include a realm byte that is 0 by default (Bitcoin). What is the realm byte for testnet and signet?
This question was originally asked by Sergei Tikhomirov in the comments of this question.

user101498: There is currently no realm byte defined for testnet and signet.
At least lseed.bitcoinstats.com and lseed.darosior.ninja don't support testnet nor signet.

47827: <p><a href="https://github.com/lightningnetwork/lightning-rfc/blob/master/10-dns-bootstrap.md#query-semantics" rel="nofollow noreferrer">BOLT 10</a> describes a node discovery mechanism based on DNS.</p>
<p>The query semantics include a realm byte that is 0 by default (Bitcoin). What is the realm byte for testnet and signet?</p>
<p>This question was originally asked by Sergei Tikhomirov in the comments of this <a href="https://bitcoin.stackexchange.com/questions/88305/why-doesnt-lightning-have-dns-bootstrapping">question</a>.</p>
 101498: <p>There is currently no realm byte defined for testnet and signet.</p>
<p>At least <code>lseed.bitcoinstats.com</code> and <code>lseed.darosior.ninja</code> <a href="https://github.com/cdecker/lseed/commit/b80ae545e9fa4b70a8216e465ac19a750a5aed9c" rel="nofollow noreferrer">don't support testnet nor signet</a>.</p>
