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dg-cm70.dgis.ro has one IP number , which also has a corresponding reverse pointer. mx.xlab.ro, mx.dgis.ro, mx2.osi7.ro, mx2.it4web.ro, mx.deltamed.ro and at least one other host point to the same IP. dgis.ro is a domain controlled by two nameservers at it4web.ro. They are on different IP networks. Incoming mail for dgis.ro is handled by two mailservers on different IP networks. dg-cm70.dgis.ro is hosted on a server in Romania.

dg-cm70.dgis.ro
a records
 
+ 81.180.160.33 81.180.160.0/20 AS30976 -
+ --- -

dgis.ro
ns-soa records
 
+   AS?  
+ ---  
ns records
ns1.it4web.ro
+ 81.180.160.2 81.180.160.0/20 AS30976 netfinity.it4web.ro
+ --- netfinity.it4web.ro
+ --- -
ns2.it4web.ro
+ 80.97.64.41 80.97.64.0/20 AS6746 it4web.cluj.astral.ro
+ --- it4web.cluj.astral.ro
mx records
mx.dgis.ro
+ 81.180.160.33 81.180.160.0/20 AS30976 dg-cm70.dgis.ro
+ --- dg-cm70.dgis.ro
mx.osi7.ro
+ 81.181.71.254 81.181.71.0/24 AS30976 mx.it4web.ro
+ --- mx.it4web.ro
ip numbers of host
81.180.160.33
ptrs of ip numbers
dg-cm70.dgis.ro
ip numbers using ptr to this host
81.180.160.33
hostnames sharing ip with a-records
mx.deltamed.ro
mx.dgis.ro
mx.skodatuning.ro
mx.xlab.ro
mx2.it4web.ro
mx2.osi7.ro
domains using this as mailserver under another name
deltamed.ro
dgis.ro
it4web.ro
xlab.ro