spf.dns-servicios.com has no NS records.
NS records for this zone are defined at dns-servicios.com.
NS records for this zone are defined at dns-servicios.com.
Question and response
Question
dig spf.dns-servicios.com. NS
Answer
The response has no answer records.
Authority
dns-servicios.com. 14400 SOA ns.hostalia.com. syadmin.hostalia.com. 1772674371 28800 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0