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mail.threeieng.com has one IP number. threeieng.com is a domain controlled by two nameservers at sigecom.com. They are on the same IP network. Incoming mail for threeieng.com is handled by two mailservers on different IP networks. threeieng.com has one IP number. mail.threeieng.com is hosted on a server in United States.

mail.threeieng.com
a records
 
+ 64.233.204.176 64.233.204.0/24 AS12026  
+ ---  

threeieng.com
a records
 
+ 168.143.57.111 168.143.0.0/16 AS2914  
+ ---  
ns-soa records
dns1.sigecom.com
+ 63.64.9.11 63.64.8.0/21 AS12026 -
+ --- -
ns records
dns1.sigecom.com
+ 63.64.9.11 63.64.8.0/21 AS12026 -
+ --- -
dns2.sigecom.com
+ 63.64.9.19 63.64.8.0/21 AS12026 -
mx records
threeieng.com
+ 168.143.57.111 168.143.0.0/16 AS2914  
+ ---  
imrpool.sigecom.net
+ 63.64.9.202 63.64.8.0/21 AS12026 -
+ --- -
ip numbers of host
64.233.204.176
ip numbers using ptr to this host
65.195.97.172
67.38.176.142