spf.wmhost.com has no NS records.
NS records for this zone are defined at wmhost.com.
NS records for this zone are defined at wmhost.com.
Question and response
Question
dig spf.wmhost.com. NS
Answer
The response has no answer records.
Authority
wmhost.com. 3600 SOA ns1.wmhost.org. hostmaster.wmhost.com. 2025071701 3600 1800 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0