netbill.ir.		30 IN SOA c.ns.arvancdn.ir. hostmaster.arvancloud.ir. (
				1760791718 ; serial
				86400      ; refresh (1 day)
				7200       ; retry (2 hours)
				604800     ; expire (1 week)
				7200       ; minimum (2 hours)
				)

netbill.ir.		30 IN TXT "v=spf1 +a +mx +ip4:78.110.121.169 ~all"

netbill.ir.		30 IN A	185.143.234.235
netbill.ir.		30 IN A	185.143.233.235

Mail exchangers:
netbill.ir.		30 IN MX 10 netbill.ir.

Name servers:
netbill.ir.		30 IN NS m.ns.arvancdn.ir.
netbill.ir.		30 IN NS c.ns.arvancdn.ir.