spf.gannett.com has no NS records.
NS records for this zone are defined at gannett.com.
NS records for this zone are defined at gannett.com.
Question and response
Question
dig spf.gannett.com. NS
Answer
The response has no answer records.
Authority
gannett.com. 8600 SOA dns1.p04.nsone.net. hostmaster.nsone.net. 1660158347 1200 1200 15552000 9600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0