com to pagerduty.com: Authoritative AAAA records exist for ns-474.awsdns-59.com, but there are no corresponding AAAA glue records. See RFC 1034, Sec. 4.2.2.
pagerduty.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. (2600:9000:5301:da00::1, 2600:9000:5303:c300::1, 2600:9000:5305:500::1, 2600:9000:5306:7b00::1, UDP_-_EDNS0_4096_D_KN)