spf.phpnet.org has no CNAME records.
Question and response
Question
dig spf.phpnet.org. NS
Answer
The response has no answer records.
Authority
phpnet.org. 1772 SOA ns.phpnet.org. grenoble.phpnet.org. 2026022729 3600 1800 1209600 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0