Question and response
Question
dig _ip4netblock.tld-mx.com. TXT
Answer
_ip4netblock.tld-mx.com. 3600 TXT "v=spf1 ip4:169.239.216.0/28 ip4:169.239.217.0/28 ip4:169.239.217.192/28 ip4:169.239.218.0/28 ip4:169.239.218.192/28 ip4:169.239.219.0/28 ip4:169.239.219.192/28 ip4:41.222.32.0/28 ip4:41.222.32.192/28 ip4:41.222.34.0/28 ip4:41.222.34.192/28 ~all"
Authority
tld-mx.com. 43200 NS ns2.tld-nscloud.net.
tld-mx.com. 43200 NS ns1.tld-nscloud.com.
tld-mx.com. 43200 NS ns3.tld-nscloud.com.
tld-mx.com. 43200 NS ns4.tld-nscloud.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0