Question and response
Question
dig _netblocks.swishmail.com. TXT
Answer
_netblocks.swishmail.com. 86400 TXT "v=spf1 ip4:208.72.56.0/22 ip4:64.39.51.0/24 ip6:2602:ffb8::/36 ~all"
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0