Hmm, I wonder if qname-minimisation is at issue here. My trace dies with: 85.191.131.in-addr.arpa. 1800 IN NS fs838.click-network.com. 85.191.131.in-addr.arpa. 1800 IN NS ns102.click-network.com. couldn't get address for 'fs838.click-network.com': not found couldn't get address for 'ns102.click-network.com': not found