Question and response
Question
dig spf-mailrouting.isc.upenn.edu. TXT
Answer
spf-mailrouting.isc.upenn.edu. 900 TXT "v=spf1 ip4:130.91.209.154 ip6:2607:f470:1004:18::21 ip4:130.91.209.155 ip6:2607:f470:1004:18::22 ip4:130.91.209.136 ip6:2607:f470:1004:18::14 ip4:130.91.209.137 ip6:2607:f470:1004:18::15 ~all"
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0