Incoming mail for macdeveloper.zzn.com is handled by two mailservers at mailcentro.com. They are on the same IP network. zzn.com, mcdem.com, e-cops.us, dprep.com, wowguy.com and at least 55 other hosts share mailservers with this domain. zzn.com is a domain controlled by four nameservers. All of them are on the same IP network. Incoming mail for zzn.com is handled by two mailservers also at mailcentro.com. They are on the same IP network. zzn.com has one IP number.