In Episode 48, we are pleased to welcome Bert Hubert of PowerDNS fame to the show.  We reach into the mailbag to answer Nic Waller’s question about measuring which names in a zone are actually queried, Jesus Cea asked about proving domain ownership to obtain a Let’s Encrypt certificate (which caused us to do some actual research before recording!), and long-suffering listener Yiorgos Adamopoulos gamely sent in a question about using the block chain for name resolution.  As usual, we indulge in light banter completely unrelated to DNS, this time on outrageous cell phone roaming charges and Dutch pipe organs.