Question and response
Question
dig _spf.comcast.com. TXT
Answer
_spf.comcast.com. 3600 TXT "v=spf1 ip4:96.99.226.135 ip4:96.99.226.136 ip4:96.99.226.137 ip4:107.20.210.250/32 ip4:75.101.148.52/32 ip4:54.229.2.165/32 ip4:54.72.219.32/32 ip4:54.153.131.110/32 ip4:54.153.134.39/32 ~all"
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0