Question and response
Question
dig _spf.webex.com. NS
Answer
_spf.webex.com. 600 NS ns1.as13445.net.
_spf.webex.com. 600 NS ns2.as13445.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0