com to zendesk.com: Authoritative AAAA records exist for ns-444.awsdns-55.com, but there are no corresponding AAAA glue records. See RFC 1034, Sec. 4.2.2.
zendesk.com/TXT: No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (205.251.193.188, 205.251.194.242, 2600:9000:5301:bc00::1, UDP_-_EDNS0_4096_D_KN)