So lately, I am having problems accessing my 0x82.com at home. This domain sits on a dynamic IP address, and I use editdns to update the DNS records.
EditDNS advertises my A record with a 0 TTL. However, I found that my ISP Sapo caches the record with a huge TTL:
0x82.com. 604800 IN A 18.104.22.168
Before I shout “what th f0ck are wrong with this guys”, I still have to do a quick read of the relevant RFC, because I think that a 0 TTL may not be a “standard” thing…
As always, if you know something about this, please shoot! :-)