What's id52?
I feel like I'm missing a lot of context to understand what's being shared here.
We are built on top of https://www.iroh.computer/blog/iroh-dns, and iroh uses the public key as the node identifier. Unfortunately the iroh id is 64 char long, which can not be used in subdomains, subdomains have a char limit of 63, so we are using dnssec base32[1], which comes to 52 chars, and we use that 52 char string as the primary identifier (instead of IP:port, which is used the "old school net" (tongue firmly in cheek), and we call it id52.
e.g. https://github.com/kulfi-project/kulfi/blob/malai-0.2.5/kulf...
$ echo -n c1b2d4463e503765b7422e126ea7ff5633ba5903f97b700ac818 | wc -c
52
I figured as much, but that's an example for an id52, but not a description of what it is.
The actual answer seems to be that these are zbase32-encoded 32 byte iroh node IDs: https://www.iroh.computer/blog/iroh-global-node-discovery