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server6.masterdedicated.com has one IP number , but the reverse is hosted-by.masterdedicated.com. masterdedicated.com is a domain controlled by two nameservers at masterdedicated.com themselves. They are on different IP networks. Incoming mail for masterdedicated.com is handled by one mailserver also at masterdedicated.com. masterdedicated.com has one IP number , but the reverse is server5.masterdedicated.com. server6.masterdedicated.com is hosted on a server in Netherlands.

server6.masterdedicated.com
a records
 
+ 85.17.45.29 85.17.0.0/16 AS16265 hosted-by.masterdedicated.com
+ --- hosted-by.masterdedicated.com

masterdedicated.com
a records
 
+ 212.95.32.49 212.95.32.0/19 AS28753 server5.masterdedicated.com
+ --- server5.masterdedicated.com
ns-soa records
ns1.masterdedicated.com
+ 212.95.32.49 212.95.32.0/19 AS28753 server5.masterdedicated.com
+ --- server5.masterdedicated.com
ns records
ns1.masterdedicated.com
+ 212.95.32.49 212.95.32.0/19 AS28753 server5.masterdedicated.com
+ --- server5.masterdedicated.com
ns2.masterdedicated.com
+ 89.149.196.151 89.149.192.0/18 AS28753 server2.masterdedicated.com
+ --- server2.masterdedicated.com
mx records
mail.masterdedicated.com
+ 212.95.32.49 212.95.32.0/19 AS28753 server5.masterdedicated.com
+ --- server5.masterdedicated.com
ip numbers of host
85.17.45.29
ptrs of ip numbers
hosted-by.masterdedicated.com