You can (ab)use a subdomain finder for trial and error: subdomainfinder.c99.nl

Subdomain 	IP 	Cloudflare
alx.lemmy.blahaj.zone		135.181.28.137		[CloudFlare is off]
beta.blahaj.zone		70.35.206.66		[CloudFlare is off]
cdn.blahaj.zone		65.109.123.113		[CloudFlare is off]
chat.blahaj.zone		37.27.12.18		[CloudFlare is off]
dev.piefed.blahaj.zone		95.216.37.177		[CloudFlare is off]
hktest.blahaj.zone		70.35.206.66		[CloudFlare is off]
lemmy.blahaj.zone		135.181.28.137		[CloudFlare is off]
linker.blahaj.zone		95.216.37.177		[CloudFlare is off]
log.blahaj.zone		95.217.22.178		[CloudFlare is off]
mlmym.lemmy.blahaj.zone		135.181.28.137		[CloudFlare is off]
phtn.lemmy.blahaj.zone		135.181.28.137		[CloudFlare is off]
pictrs.blahaj.zone		65.109.123.113		[CloudFlare is off]
piefed.blahaj.zone		95.216.37.177		[CloudFlare is off]
piefed.cdn.blahaj.zone		65.109.123.113		[CloudFlare is off]
pix.blahaj.zone		95.216.37.177		[CloudFlare is off]
pix.cdn.blahaj.zone		65.109.123.113		[CloudFlare is off]
sharkey.blahaj.zone		95.216.200.145		[CloudFlare is off]
shop.blahaj.zone		95.217.152.80		[CloudFlare is off]
ssc.tools.blahaj.zone		95.217.22.178		[CloudFlare is off]
ssync.blahaj.zone		37.27.12.18		[CloudFlare is off]
static.blahaj.zone		95.217.22.178		[CloudFlare is off]
stun.blahaj.zone		37.27.12.18		[CloudFlare is off]
tes.lemmy.blahaj.zone		135.181.28.137		[CloudFlare is off]
testy.blahaj.zone		3.216.63.99		[CloudFlare is off]
tube.blahaj.zone		95.216.37.177		[CloudFlare is off]
tube.cdn.blahaj.zone		65.109.123.113		[CloudFlare is off]
turn.blahaj.zone		37.27.12.18		[CloudFlare is off]
ube.cdn.blahaj.zone		65.109.123.113		[CloudFlare is off]
www.blahaj.zone		95.217.22.178		[CloudFlare is off]
axd.lemmy.blahaj.zone		none		[CloudFlare is off]
groups.blahaj.zone		none		[CloudFlare is off]