mx1.34sp.com has one IP number , which also has a corresponding reverse pointer. 34sp.com, mcqn.net, robr.net, ormes.net, nalla.net and at least 100 other hosts use this as a mailserver. 34sp.com is a domain controlled by two nameservers at 34sp.com themselves. They are on different IP networks. Incoming mail for 34sp.com is handled by three mailservers also at 34sp.com. Two of them are on the same IP network. 34sp.com has one IP number. mx1.34sp.com is hosted on a server in United Kingdom.