Summary
dns2.portone.com has one IP number , but the reverse is
ns2.mdnsservice.com.
ns2.x13.com,
ns2.3tec.com,
ns2.logix.ca,
ns2.skr34m.com,
ns.inetltd.com and at least 16 other hosts point to the same IP.
dips.net,
acns.org,
aapl.org,
hfpg.org,
npkey.com and at least 100 other hosts use this as a nameserver.
portone.com is delegated to three nameservers, however all three delegated nameservers are missing in the zone and three other nameservers are listed instead. There are three duplicated IP numbers. Some of them are on the same IP network. Incoming mail for
portone.com is handled by four mailservers. All of them are on the same IP network.
portone.com has one IP number.
dns2.portone.com is hosted on a server in Canada.