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mail.pgen.com has one IP number , which also has a corresponding reverse pointer. mail1.eon-uk.com and mail1.eon-uk.net point to the same IP. eme.co.uk, plugin2engineering.com, powerdiscoveryzone.com and plugin2engineering.co.uk use this as a mailserver. pgen.com is a domain controlled by four nameservers at dns.gxn.net. Some of them are on the same IP network. Incoming mail for pgen.com is handled by twelve mailservers. There are two duplicated IP numbers. Some of them are on the same IP network. pgen.com has one IP number. mail.pgen.com is hosted on a server in United Kingdom.

mail.pgen.com
a records
 
+ 217.158.191.217 217.158.0.0/16 AS8426 -
+ --- -

pgen.com
a records
 
+ 213.205.149.46 213.205.128.0/18 AS5413  
+ ---  
ns-soa records
auth1.dns.gxn.net
+ 195.224.255.2 195.224.0.0/16 AS5413 -
+ --- -
ns records
auth1.dns.gxn.net
+ 195.224.255.2 195.224.0.0/16 AS5413 -
+ --- -
auth2.dns.gxn.net
+ 195.224.255.6 195.224.0.0/16 AS5413 -
auth3.dns.gxn.net
+ 62.44.64.110 62.44.64.0/19 AS5413 -
auth4.dns.gxn.net
+ 195.224.255.94 195.224.0.0/16 AS5413 -
mx records
mail1.eon-uk.com
+ 217.158.191.217 217.158.0.0/16 AS8426 mail.pgen.com
+ --- mail.pgen.com
mail3.eon-uk.com
+ 147.89.238.30 147.89.224.0/20 AS43453 -
+ --- -
mail4.eon-uk.com
+ 147.89.238.32 147.89.224.0/20 AS43453 -
mail5.eon-uk.com
+ 147.89.238.32 147.89.224.0/20 AS43453 mail4.eon-uk.com
+ --- mail4.eon-uk.com
mail6.eon-uk.com
+ 147.89.238.33 147.89.224.0/20 AS43453  
+ ---  
mail9.eon-is.com
+ 147.89.224.204 147.89.224.0/20 AS43453  
mail2.eon-is.com
+ 217.67.37.233 217.67.32.0/20 AS16084 -
+ --- -
mail3.eon-is.com
+ 217.67.37.234 217.67.32.0/20 AS16084 -
mail4.eon-is.com
+ 193.26.47.132 193.26.47.0/24 AS43450 -
mail5.eon-is.com
+ 193.26.47.134 193.26.47.0/24 AS43450 -
mail8.eon-is.com
+   AS?  
+ ---  
mail2.eon-uk.com
+ 147.89.238.30 147.89.224.0/20 AS43453 mail3.eon-uk.com
+ --- mail3.eon-uk.com
ip numbers of host
217.158.191.217
ptrs of ip numbers
mail.pgen.com
ip numbers using ptr to this host
217.158.191.217
hostnames sharing ip with a-records
mail1.eon-uk.com
mail1.eon-uk.net
domains using this as mailserver
eme.co.uk
plugin2engineering.co.uk
plugin2engineering.com
powerdiscoveryzone.com
domains using this as mailserver under another name
central-networks.co.uk
eon-uk.com
eon-uk.net
eonenergy.com
pgen.com