Question and response
Question
dig _netblocks1.demandware.net. TXT
Answer
_netblocks1.demandware.net. 3600 TXT "v=spf1 ip4:13.110.96.0/19 ip4:13.110.128.0/18 ip4:103.91.167.97/32 ip4:103.91.167.225/32 ip4:104.161.128.0/17 ip4:136.146.56.0/25 -all"
Authority
demandware.net. 7200 NS dns01.salesforce.com.
demandware.net. 7200 NS dns02.salesforce.com.
demandware.net. 7200 NS dns03.salesforce.com.
demandware.net. 7200 NS dns04.salesforce.com.
demandware.net. 7200 NS dns05.salesforce.com.
demandware.net. 7200 NS dns06.salesforce.com.
demandware.net. 7200 NS u2dns1.salesforce.com.
demandware.net. 7200 NS u2dns2.salesforce.com.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0