Question and response
Question
dig _spf0000007.tangocard.com. TXT
Answer
_spf0000007.tangocard.com. 300 TXT "v=spf1 ip6:2a01:111:f403:c000::/51 ip6:2a01:111:f403:f000::/52 ~all"
Authority
_spf0000007.tangocard.com. 172800 NS ns-1484.awsdns-57.org.
_spf0000007.tangocard.com. 172800 NS ns-1753.awsdns-27.co.uk.
_spf0000007.tangocard.com. 172800 NS ns-276.awsdns-34.com.
_spf0000007.tangocard.com. 172800 NS ns-548.awsdns-04.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0